[L] Change in coreboot[main]: soc/mediatek/mt8196: Add a stub implementation of the MT8196 SoC

[Yidi Lin (Code Review)]

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

Yidi Lin has posted comments on this change by Jarried Lin. ( https://review.coreboot.org/c/coreboot/+/83572?usp=email )

Change subject: soc/mediatek/mt8196: Add a stub implementation of the MT8196 SoC
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Patch Set 7: Code-Review+2