Change in coreboot[master]: soc/mediatek/mt8195: Add GPIO driver

[Yidi Lin (Code Review)]

Attention is currently required from: Hung-Te Lin, Martin Roth, Yidi Lin, JG Poxu.
Yidi Lin has uploaded a new patch set (#5) to the change originally created by Rex-BC Chen. ( https://review.coreboot.org/c/coreboot/+/52598 )

Change subject: soc/mediatek/mt8195: Add GPIO driver
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soc/mediatek/mt8195: Add GPIO driver

Signed-off-by: Po Xu 
Change-Id: Ica1b1c80a851075599442298bb6675caf5c72f57
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M src/soc/mediatek/mt8195/Makefile.inc
A src/soc/mediatek/mt8195/gpio.c
A src/soc/mediatek/mt8195/include/soc/gpio.h
A src/soc/mediatek/mt8195/include/soc/gpio_base.h
4 files changed, 613 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/98/52598/5