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, Angel Pons, Subrata Banik, Patrick Rudolph.
Meera Ravindranath has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52758 )

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

Patch Set 28:

(1 comment)

File src/drivers/intel/gma/opregion.c:

https://review.coreboot.org/c/coreboot/+/52758/comment/2fa16048_5bf440ac 
PS26, Line 280: return (header->opver.major >= 2 && header->opver.minor >= 1) ||
              : 	(header->opver.major > 2);
> Ping

Done. Sorry for the delay, was waiting for some feedback on CB:56303.