SMM: add guard and include types.h in cpu/x86/smm.h

Change-Id: I002845cf7a37cd6885456131826ae0ba681823ef
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/64
Tested-by: build bot (Jenkins)
1 file changed