Change in coreboot[master]: util/mb/google: add support for brya

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Paul Fagerburg.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/54489 )

Change subject: util/mb/google: add support for brya
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Patch Set 1:

(1 comment)

Patchset:

PS1: 
```
util/mainboard/google/brya0/template/include/variant/ec.h has multiple final newlines.
util/mainboard/google/brya0/template/include/variant/gpio.h has multiple final newlines.
util/mainboard/google/brya0/template/overridetree.cb has multiple final newlines.
```