[M] Change in coreboot[main]: soc/mediatek/mt8196: Add SPI driver support

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Hung-Te Lin, Jarried Lin, Yidi Lin.

Yu-Ping Wu has posted comments on this change by Jarried Lin. ( https://review.coreboot.org/c/coreboot/+/84930?usp=email )

Change subject: soc/mediatek/mt8196: Add SPI driver support
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Patch Set 3:

(3 comments)

File src/soc/mediatek/mt8196/include/soc/spi.h:

https://review.coreboot.org/c/coreboot/+/84930/comment/77378dd5_457530c4?usp... :
PS3, Line 8: #ifndef __SOC_MEDIATEK_MT8196_SPI_H__
Why change it? The code in mediatek/ is already inconsistent.

https://review.coreboot.org/c/coreboot/+/84930/comment/3db69873_0868ec4e?usp... :
PS3, Line 15: x
`(x)`

File src/soc/mediatek/mt8196/spi.c:

https://review.coreboot.org/c/coreboot/+/84930/comment/9cf45a66_cf894d7f?usp... :
PS3, Line 123: SPI_BUS_NUMBER
`ARRAY_SIZE(pad_funcs[0])`

I fixed mt8188 in CB:84950.