[S] Change in coreboot[master]: mb/google/rex: Add fingerprint SPI

[Eran Mitrani (Code Review)]

Attention is currently required from: Eran Mitrani, Subrata Banik, Kapil Porwal, Eric Lai.

Hello build bot (Jenkins), Tarun Tuli, Subrata Banik, Kapil Porwal,

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

https://review.coreboot.org/c/coreboot/+/66992

to look at the new patch set (#12).

Change subject: mb/google/rex: Add fingerprint SPI
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mb/google/rex: Add fingerprint SPI

Add Fingerprint SPI, and power-off FPMCU during romstage.
for reference see CL:66915 for a similar change to Brya's power sequence

TEST=None yet. Awaiting Hardware

Change-Id: I4e6be24e72a8232ae2c958a01cf8ea9a272d7365
Signed-off-by: Eran Mitrani 
---
M src/mainboard/google/rex/Kconfig
M src/mainboard/google/rex/variants/rex0/gpio.c
M src/mainboard/google/rex/variants/rex0/overridetree.cb
3 files changed, 36 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/66992/12