[L] Change in coreboot[master]: mb/amd/mayan: Add framework for morgana crb mayan

[Paul Menzel (Code Review)]

Attention is currently required from: ritul guru, Felix Held.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70010 )

Change subject: mb/amd/mayan: Add framework for morgana crb mayan
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Patch Set 1:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/70010/comment/cdccdcf5_a46bb877 
PS1, Line 9:     mayan is the reference board for the morgana SoC. It needs to be
           :     updated to match the actual board design as well.
           :     amd/mayan is started as a copy of amd/birman.
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