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

[Hung-Te Lin (Code Review)]

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

Change subject: soc/mediatek: Add early_init for passing data across sessions
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Patch Set 6:

(1 comment)

File src/soc/mediatek/common/Kconfig:

https://review.coreboot.org/c/coreboot/+/63019/comment/66f8a37d_22d9ab24 
PS1, Line 53: config MEDIATEK_EARLY_INIT
            : 	bool
            : 	help
            : 	  This option allows passing data across sessions.
> hungte?

Currently the common/* is added into build rules from SoC folder Makefile, so I think it's still easy to "only +early_init.c for platforms having early init in the memlayout.ld". Unless if we'll be sharing a module, for example PCIe, for multiple platforms that only some of them will do early_init.

I still think we don't need EARLY_INIT to be a config, unless if you really see build failure (in fact, I'm even considering to add early_init to old platforms if we start adding non-pcie fields to them).