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

[Ren Kuo (Code Review)]

Attention is currently required from: Ofer Fried, Tim Wawrzynczak.

Hello build bot (Jenkins), Tarun Tuli, David Wu, Ofer Fried, Tim Wawrzynczak, Nick Vaccaro, Eric Lai,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/68917

to look at the new patch set (#4).

Change subject: mb/google/brya/variants/volmar: Add firmware config field for FPMCU
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mb/google/brya/variants/volmar: Add firmware config field for FPMCU

The fingerprint(FP) feature is only for volmar,and it's not for zavala.
Add FPMCU_MASK field in fw_config to disable the FP function for
zavala, and reserve FP function for shipped volmar.
Define the value as following:

field FPMCU_MASK 10
    	option FPMCU_ENABLED		0
    	option FPMCU_DISABLED		1
    end

BUG=b:250807253
TEST=build firmware and verify the fp function in volmar DUT.
     write `disable=1` and 'enable=0' in FPCMU_MASK field.
     check the fp function and run `ectool --name cros_fp version`
     It works as expected.

Signed-off-by: Ren Kuo 
Change-Id: I867771904811459697056662d5e29c545a1a9474
---
M src/mainboard/google/brya/variants/volmar/overridetree.cb
M src/mainboard/google/brya/variants/volmar/variant.c
2 files changed, 37 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/17/68917/4