Change in coreboot[master]: soc/mediatek/mt8195: Add early init support

[Hung-Te Lin (Code Review)]

Attention is currently required from: Paul Menzel, Rex-BC Chen, Angel Pons, Yu-Ping Wu, Jianjun Wang.
Hung-Te Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63020 )

Change subject: soc/mediatek/mt8195: Add early init support
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Patch Set 1:

(2 comments)

File src/mainboard/google/cherry/bootblock.c:

https://review.coreboot.org/c/coreboot/+/63020/comment/32cfcdc1_ceba0e85 
PS1, Line 49: 		mtk_clear_early_init();
> Can we do this in bootblock_soc_init()?

agree, if bootblock_soc_init runs earlier than bootblock_mainboard_init then we should do it there

https://review.coreboot.org/c/coreboot/+/63020/comment/2c1a76a5_ff118c52 
PS1, Line 51: 	if (CONFIG(PCI))
            : 		mtk_pcie_pre_init();
shouldn't we do this only if MEDIATEK_EARLY_INIT is set?