Change in coreboot[master]: mb/google/volteer: Add settings for noise mitgation

[Furquan Shaikh (Code Review)]

Attention is currently required from: Shaunak Saha, Caveh Jalali, Duncan Laurie, Nick Vaccaro.
Furquan Shaikh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/50419 )

Change subject: mb/google/volteer: Add settings for noise mitgation
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Patch Set 1:

(1 comment)

File src/mainboard/google/volteer/variants/baseboard/devicetree.cb:

https://review.coreboot.org/c/coreboot/+/50419/comment/4a3c1f2b_7ff439b5 
PS1, Line 341: VR_DOMAIN_GT
> I followed the FSP code to get those domains. In FSP code they are talking about all these domains.

I am looking at `GetMaxNumVrsFru` in FSP. And it returns 1 for maximum number of VRs. Can you please check on that?