Change in coreboot[master]: soc/mediatek/mt8186: Add a stub implementation of the MT8186 SoC

[Hung-Te Lin (Code Review)]

Attention is currently required from: Rex-BC Chen, Paul Menzel, Yu-Ping Wu, Felix Held.
Hung-Te Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58640 )

Change subject: soc/mediatek/mt8186: Add a stub implementation of the MT8186 SoC
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Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/58640/comment/bc6ec4a7_6abcefab 
PS2, Line 10:
> And that is big problem, and has to be improved. The commit you referenced should have had a more elaborate commit message.

Then can you find a really good example that is providing all information asked here?

Even the Intel one is probably not good enough: https://review.coreboot.org/c/coreboot/+/44857

Although, they do have a good example of having data sheet name and chapter in the file comments. @Rex can you follow the comment style in CL:44875  and update the files?

/*
  * This file is created based on XXX Datasheet
  * Document number: 621483
  * Chapter number: 2, 3, 4, 27, 28
  */