[L] Change in coreboot[master]: mb/intel/mtlrvp: Enable EC and building ChromeOS

[Harsha B R (Code Review)]

Attention is currently required from: Wonkyu Kim, Ravishankar Sarawadi, Rizwan Qureshi, Paul Menzel, Angel Pons, Krishna P Bhat D, Tim Wawrzynczak, Tarun Tuli, Jamie Ryu, Subrata Banik, Harsha B R, Kapil Porwal, Nick Vaccaro, Ronak Kanabar, Usha P, Raj Astekar.

Harsha B R has uploaded a new patch set (#13) to the change originally created by Jamie Ryu. ( https://review.coreboot.org/c/coreboot/+/66101 )

Change subject: mb/intel/mtlrvp: Enable EC and building ChromeOS
......................................................................

mb/intel/mtlrvp: Enable EC and building ChromeOS

This configures and initializes EC, and adds building ChromeOS.

BUG=b:224325352
TEST=FW_NAME=mtlrvp_p emerge-rex coreboot chromeos-bootimage

Signed-off-by: Jamie Ryu 
Change-Id: I662d7f79050d35e152d97dc5c2118a4af56223bc
Signed-off-by: Harsha B R 
---
M src/mainboard/intel/mtlrvp/Kconfig
M src/mainboard/intel/mtlrvp/Makefile.inc
A src/mainboard/intel/mtlrvp/chromeos.c
D src/mainboard/intel/mtlrvp/devicetree.cb
M src/mainboard/intel/mtlrvp/dsdt.asl
A src/mainboard/intel/mtlrvp/ec.c
A src/mainboard/intel/mtlrvp/mainboard.c
A src/mainboard/intel/mtlrvp/smihandler.c
M src/mainboard/intel/mtlrvp/variants/baseboard/include/baseboard/variants.h
A src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp/include/baseboard/ec.h
M src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp/include/baseboard/gpio.h
A src/mainboard/intel/mtlrvp/variants/mtlrvp_p/Makefile.inc
A src/mainboard/intel/mtlrvp/variants/mtlrvp_p/devicetree.cb
A src/mainboard/intel/mtlrvp/variants/mtlrvp_p/gpio.c
A src/mainboard/intel/mtlrvp/variants/mtlrvp_p/include/variant/ec.h
A src/mainboard/intel/mtlrvp/variants/mtlrvp_p/include/variant/gpio.h
16 files changed, 344 insertions(+), 7 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/01/66101/13