[S] Change in coreboot[main]: mb/google/brya: Create yavista variant

[Paul Menzel (Code Review)]

Attention is currently required from: Derek Huang, Kapil Porwal, Nick Vaccaro, Rasheed Hsueh, Subrata Banik.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/80342?usp=email )

Change subject: mb/google/brya: Create yavista variant
......................................................................

Patch Set 5:

(1 comment)

File src/mainboard/google/brya/variants/yavista/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/80342/comment/417aca27_7deb1bdb :
PS5, Line 3:         device domain 0 on
           :         end
Should tabs be used for indentation?