hwaccess: move mmio functions into hwaccess_physmap

The mmio_le/be_read/writex functions are used for raw memory access.
Bundle them with the physmap functions.

Change-Id: I313062b078e89630c703038866ac93c651f0f49a
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/61160
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72278
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
28 files changed