Add functions to read and write the region in the AcpiMmio block.
Convert gpio.c to use them instead of creating pointers.
Change-Id: I2a0f44b6ec7261648cf0357b44a6c18dd40d1504
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32647
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
976e3e9ae6