[S] Change in coreboot[main]: mb/google/rex/var/karis: add hook for WiFi SAR table

[Sumeet R Pawnikar (Code Review)]

Attention is currently required from: Eran Mitrani, Kapil Porwal, Tarun, YH Lin.

Sumeet R Pawnikar has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78260?usp=email )

The change is no longer submittable: All-Comments-Resolved is unsatisfied now.

Change subject: mb/google/rex/var/karis: add hook for WiFi SAR table
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Patch Set 2:

(2 comments)

Patchset:

PS2: 
Does it make sense if we make Kconfig change in a separate patch?

File src/mainboard/google/rex/Kconfig:

https://review.coreboot.org/c/coreboot/+/78260/comment/dcd36123_c3e996a8 :
PS2, Line 48: CHROMEOS_WIFI_SAR
As per the code changes here if required please add the information in commit message that adding this option for overall Rex baseboard and removing the same for Rex and Screebo models.