physmap: Implement source-aligned version of mmio_readn()

Implement readn() with explicit alignment of the source pointer.

Change-Id: Ic754c552c826ec06ea209a039c3035265ca61c9a
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72581
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed