Allow x86 msr related code to be compiled independent from memory
mapping functionality. This enables for a better selection of needed
hardware access types.
Change-Id: Idc9ce9df3ea1e291ad469de59467646b294119c4
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/60111
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
