hwaccess physmap: move x86 msr related code into own files

Allow x86 msr related code to be compiled independent from memory
mapping functionality. This enables for a better selection of needed
hardware access types.

flashrom-stable: Squashed fixup for FreeBSD

Change-Id: Idc9ce9df3ea1e291ad469de59467646b294119c4
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/60111
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72266
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
9 files changed