Change in coreboot[master]: soc/mediatek/mt8186: Add GPIO driving functions

[Paul Menzel (Code Review)]

Attention is currently required from: Hung-Te Lin, Rex-BC Chen.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62471 )

Change subject: soc/mediatek/mt8186: Add GPIO driving functions
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Patch Set 7:

(1 comment)

File src/soc/mediatek/common/include/soc/gpio_common.h:

https://review.coreboot.org/c/coreboot/+/62471/comment/f3b7b45e_a948b162 
PS4, Line 31: };
> There are 8 stage for all mediatek SoCs, but they may have different drive strength. […]

I am still not fully convinced, but am too ignorant to hold this up.