Change in coreboot[master]: soc/mediatek/mt8186: add early initialization for eMMC

[Hung-Te Lin (Code Review)]

Attention is currently required from: Rex-BC Chen.
Hung-Te Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59294 )

Change subject: soc/mediatek/mt8186: add early initialization for eMMC
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Patch Set 2:

(1 comment)

File src/soc/mediatek/mt8186/msdc.c:

https://review.coreboot.org/c/coreboot/+/59294/comment/4dfa4c00_c6dfb4f0 
PS2, Line 62: mtk_emmc_early_init((void *)MSDC0_BASE, (void *)MSDC0_TOP_BASE);
give this is a board-specific feature (e.g., some boards may prefer to not do early init, if they don't use depthcharge) I think this should invoked from mainboard.c, of change the function to mtk_msdc_configure_emmc(int early_init) and only do early_init if the param is 1.