Change in coreboot[master]: drivers/intel/gma: Support IGD Opregion 2.1

[Meera Ravindranath (Code Review)]

Attention is currently required from: Nico Huber, Krishna Prabhakaran, Furquan Shaikh, Maulik V Vaghela, Selma Bensaid, Tim Wawrzynczak, Subrata Banik, Meera Ravindranath, Patrick Rudolph.
Hello build bot (Jenkins), Nico Huber, Krishna Prabhakaran, Furquan Shaikh, Maulik V Vaghela, Selma Bensaid, Tim Wawrzynczak, Angel Pons, Subrata Banik, Patrick Rudolph,

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

https://review.coreboot.org/c/coreboot/+/52758

to look at the new patch set (#28).

Change subject: drivers/intel/gma: Support IGD Opregion 2.1
......................................................................

drivers/intel/gma: Support IGD Opregion 2.1

List of changes:
1. Define new configs for Opregion versions.
2. Assign RVDA to relative address of the Opregion buffer
   in case of opregion 2.1+.

BUG=b:190019970
BRANCH=None

Signed-off-by: Meera Ravindranath 
Change-Id: I95a9f3df185002a4e38faa910f867ace0b97ac2b
---
M src/drivers/intel/gma/Kconfig
M src/drivers/intel/gma/opregion.c
M src/drivers/intel/gma/opregion.h
3 files changed, 37 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/52758/28