[S] Change in coreboot[master]: mb/google/nissa/var/craask: Add wifi sar table

[Reka Norman (Code Review)]

Attention is currently required from: Tarun Tuli, Kangheui Won, Tim Wawrzynczak, Tyler Wang, Nick Vaccaro, Eric Lai.

Reka Norman has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68660 )

Change subject: mb/google/nissa/var/craask: Add wifi sar table
......................................................................

Patch Set 7:

(4 comments)

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

https://review.coreboot.org/c/coreboot/+/68660/comment/dd9e9fdb_5acafe5f 
PS7, Line 23: 16
15?

https://review.coreboot.org/c/coreboot/+/68660/comment/a354c29a_c1b4bd34 
PS7, Line 25: UN_USED
UNUSED

File src/mainboard/google/brya/variants/craask/variants.c:

PS7: 
Please rename this to `variant.c`

https://review.coreboot.org/c/coreboot/+/68660/comment/65e95f38_51df45e8 
PS7, Line 19: WIFI_SAR_CBFS_DEFAULT_FILENAME
This file won't exist. Maybe return NULL by default instead? This function shouldn't be called for devices without Intel wifi anyway.