Change in coreboot[master]: soc/mediatek: Add mtk_early_init for passing data across sessions

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Hung-Te Lin, Rex-BC Chen, Paul Menzel, Angel Pons, Jianjun Wang.
Yu-Ping Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63019 )

Change subject: soc/mediatek: Add mtk_early_init for passing data across sessions
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Patch Set 1:

(1 comment)

File src/soc/mediatek/common/Kconfig:

https://review.coreboot.org/c/coreboot/+/63019/comment/b9adfd15_cb017e1a 
PS1, Line 53: config MEDIATEK_EARLY_INIT
            : 	bool
            : 	help
            : 	  This option allows passing data across sessions.
> I think we don't need to make this a config, because in memlayout. […]

But the region may not exist on other MTK SoCs?