soc/amd/common/block/include/gpio_defs: use bit definitions for masks

soc/amd/common/block/include/gpio_defs: use bit definitions for masks

All bits covered by the bit masks GPIO_INT_ENABLE_MASK, GPIO_PULL_MASK,
GPIO_STATUS_MASK and GPIO_WAKE_MASK already have definitions in the code
so use those instead of magic numbers.

TEST=Timeless build results in identical image for amd/mandolin.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I0bc9e1cecf2f063b42de3f8875fee421dd256648
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59593
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>