[coreboot-gerrit] Change in coreboot[master]: mb/google/brya: Drop INTEL_CAR_NEM Kconfig select on Brya

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Maulik V Vaghela, Subrata Banik, EricR Lai.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59272 )

Change subject: mb/google/brya: Drop INTEL_CAR_NEM Kconfig select on Brya
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Patch Set 1:

(1 comment)

Patchset:

PS1: 
This affects all of the variants too, I don't know if they have all stopped using the old silicon revs without enem support (that would hard hang in bootblock when touching the enem MSRs).

What about a brya-specific Kconfig here in this file like

```
config USE_ADL_ENEM
     def_bool n
     select INTEL_CAR_NEM_ENHANCED
     help
       When selected, the variant will use eNEM instead of regular NEM.

config USE_ADL_NEM
     def_bool y
     select INTEL_CAR_NEM
     help
       When selected, the variant will use regular NEM.

and then brya0 can deselect USE_ADL_NEM and choose USE_ADL_ENEM
```