[L] Change in coreboot[main]: soc/mediatek: Remove redundant struct pad_func and PAD_* definitions

[Yidi Lin (Code Review)]

Attention is currently required from: Hung-Te Lin, Xi Chen, Yu-Ping Wu.

Yidi Lin has posted comments on this change by Yidi Lin. ( https://review.coreboot.org/c/coreboot/+/84222?usp=email )

Change subject: soc/mediatek: Remove redundant struct pad_func and PAD_* definitions
......................................................................

Patch Set 3:

(2 comments)

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

https://review.coreboot.org/c/coreboot/+/84222/comment/87698039_af5c90ae?usp... :
PS2, Line 59:
> `(struct pad_func)` to ensure the correct type. Same for the other macros below.

The compiler will raise `error: initializer element is not constant`.

https://review.coreboot.org/c/coreboot/+/84222/comment/221560ab_b819366c?usp... :
PS2, Line 59: }
> Thanks. […]

Done