Relicense libhwbase under GPL v2+

Change-Id: Id91d759fa1f6691dbcd228730809064fc8305af2
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17053
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/common/hw-mmio_range.ads b/common/hw-mmio_range.ads
index 1b33630..8495f73 100644
--- a/common/hw-mmio_range.ads
+++ b/common/hw-mmio_range.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-mmio_regs.adb b/common/hw-mmio_regs.adb
index 5eea563..acd23ec 100644
--- a/common/hw-mmio_regs.adb
+++ b/common/hw-mmio_regs.adb
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-mmio_regs.ads b/common/hw-mmio_regs.ads
index 9aafed9..774b2b8 100644
--- a/common/hw-mmio_regs.ads
+++ b/common/hw-mmio_regs.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-port_io.adb b/common/hw-port_io.adb
index e8adfc2..0ae03f1 100644
--- a/common/hw-port_io.adb
+++ b/common/hw-port_io.adb
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-port_io.ads b/common/hw-port_io.ads
index a5d0e9e..94b5197 100644
--- a/common/hw-port_io.ads
+++ b/common/hw-port_io.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-sub_regs.ads b/common/hw-sub_regs.ads
index ca04c1d..5ddf3ba 100644
--- a/common/hw-sub_regs.ads
+++ b/common/hw-sub_regs.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-time-timer.ads b/common/hw-time-timer.ads
index 4676815..cfe2e0b 100644
--- a/common/hw-time-timer.ads
+++ b/common/hw-time-timer.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-time.adb b/common/hw-time.adb
index 3162de1..c1666a6 100644
--- a/common/hw-time.adb
+++ b/common/hw-time.adb
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw-time.ads b/common/hw-time.ads
index 743279b..aeda5ec 100644
--- a/common/hw-time.ads
+++ b/common/hw-time.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/common/hw.ads b/common/hw.ads
index 6bfca91..9adb794 100644
--- a/common/hw.ads
+++ b/common/hw.ads
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of