Add OpenBSD support

Add a requirements section to the man page which lists the needed access
permissions for each programmer.

This feature needs my pciutils/libpci 8/16-bit write emulation patch at
http://marc.info/?l=openbsd-ports&m=127780030728045 titled
[PATCH] Fix pciutils non-32bit PCI write on OpenBSD

Corresponding to flashrom svn r1067.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stuart Henderson <sthen@openbsd.org>
diff --git a/Makefile b/Makefile
index 00ab0b2..96de0ae 100644
--- a/Makefile
+++ b/Makefile
@@ -48,6 +48,10 @@
 CPPFLAGS += -I/usr/local/include
 LDFLAGS += -L/usr/local/lib
 endif
+ifeq ($(OS_ARCH), OpenBSD)
+CPPFLAGS += -I/usr/local/include
+LDFLAGS += -L/usr/local/lib
+endif
 ifeq ($(OS_ARCH), DOS)
 EXEC_SUFFIX := .exe
 CPPFLAGS += -I../libgetopt -I../libpci/include
@@ -259,6 +263,10 @@
 LIBS += ../libpci/lib/libpci.a
 else
 LIBS += -lpci
+ifeq ($(OS_ARCH), OpenBSD)
+# For (i386|amd64)_iopl(2).
+LIBS += -l$(shell uname -m)
+endif
 endif
 endif
 endif