[S] Change in coreboot[master]: mb/google/brya/variants/volmar: Add firmware config field for FP_MCU

[Ren Kuo (Code Review)]

Attention is currently required from: Tarun Tuli, Tim Wawrzynczak, Nick Vaccaro.

Ren Kuo has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68917 )

Change subject: mb/google/brya/variants/volmar: Add firmware config field for FP_MCU
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Patch Set 2:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/68917/comment/85bef91e_dc26abfb 
PS2, Line 23: 		option FPMCU_ENABLED		0
> Is there a reason these are backwards from all the others?  It makes more sense for 0 to be disabled […]

Hi Nick,

Shipping firmware of volmar is without FP_MASK field in firmware config,
and the field value was 0 in CBI for volmar.

Once the uprev firmware included the CL updated in volmar DUT,it will has 
no FP function as the definition:
1 = enabled ; 0 = disabled

To reserve the enabled FP function for shipping volmar DUT, we defined as 
1 = disable; 0 = enabled

For zavala, we will set the field=1 (disabled) in CBI,and volmar will keep
the field =0 (enabled).