Add Div_Round_Closest() for positive integer types

Change-Id: Ic8d398902947bf18d97c9ab3c6ca6204aa0629f0
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/18356
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: Nico Huber <nico.h@gmx.de>
diff --git a/common/Makefile.inc b/common/Makefile.inc
index b8e4f35..e74081d 100644
--- a/common/Makefile.inc
+++ b/common/Makefile.inc
@@ -1,3 +1,4 @@
+hw-y += hw.adb
 hw-y += hw.ads
 hw-y += hw-mmio_range.ads
 hw-y += hw-mmio_regs.adb