Change in coreboot[master]: vendor: mediatek: Add mediatek mt8192 dram initialization code

[Hung-Te Lin (Code Review)]

Attention is currently required from: Xi Chen, Nico Huber, Martin Roth, Paul Menzel, Julius Werner, Angel Pons, Yu-Ping Wu.
Hung-Te Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/50294 )

Change subject: vendor: mediatek: Add mediatek mt8192 dram initialization code
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Patch Set 18:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/50294/comment/f96c5813_42bd1c04 
PS5, Line 10: convinient
> convenient

Ack

File src/vendorcode/mediatek/Kconfig:

https://review.coreboot.org/c/coreboot/+/50294/comment/4b61a4eb_66e619d7 
PS16, Line 3: config DEBUG_DRAM
            : 	bool "Output verbose DRAM related debug messages"
            : 	default y
            : 	help
            : 	  This option enables additional DRAM related debug messages.
> Thanks for all your advice. Reuse DEBUG_RAM_SETUP is very good. […]

I think we don't hae a standard err/info at the moment.