Change in coreboot[master]: mb/google/volteer/var/volet: Update gpio and devicetree settings

[Sheng-Liang Pan (Code Review)]

Attention is currently required from: Tim Wawrzynczak.
Hello Tim Wawrzynczak,

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

https://review.coreboot.org/c/coreboot/+/55113

to look at the new patch set (#2).

Change subject: mb/google/volteer/var/volet: Update gpio and devicetree settings
......................................................................

mb/google/volteer/var/volet: Update gpio and devicetree settings

Based on schematic and gpio table of volet, update gpio and
devicetree settings for volet Proto.

BUG=b:186334008
TEST=FW_NAME=volet emerge-volteer coreboot chromeos-bootimage

Signed-off-by: Sheng-Liang Pan 
Change-Id: Ia0e9557e01ce1e7a49a3dddf6da3e4a29587a8b7
---
M src/mainboard/google/volteer/variants/volet/Makefile.inc
A src/mainboard/google/volteer/variants/volet/gpio.c
M src/mainboard/google/volteer/variants/volet/overridetree.cb
A src/mainboard/google/volteer/variants/volet/ramstage.c
4 files changed, 533 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/13/55113/2