Change in coreboot[master]: mb/intel/adlrvp: Disable PM Timer for ADL-N

[Maulik V Vaghela (Code Review)]

Attention is currently required from: V Sowmya, Kangheui Won, Reka Norman, Rizwan Qureshi, Krishna P Bhat D, Usha P.
Maulik V Vaghela has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62915 )

Change subject: mb/intel/adlrvp: Disable PM Timer for ADL-N
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Patch Set 3:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62915/comment/98301c64_cd423129 
PS3, Line 9: Keeping the PM timer enabled will disqualify an ADL system from entering
> We already have it disabled for all brya variants including nivviks and nereid. […]

Hi Kangheui/Reka,
Yes, It'll apply to all ADL-N platforms and all the boards including ADLRVP.

@Reka, We have not disabled it for ADL-P RVP for 2 reasons. 
1. We were using reference platform Brya for most of the power measurement, so ADL-P RVP was not used for s0i3 measurement. 
2. if we want to use Tianocore payload, we might require PM timer enabled.

Hope this clarifies :)