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

[Angel Pons (Code Review)]

Attention is currently required from: Nico Huber, Krishna Prabhakaran, Furquan Shaikh, Maulik V Vaghela, Selma Bensaid, Subrata Banik, Meera Ravindranath, Patrick Rudolph.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52758 )

Change subject: drivers/intel/gma: Support IGD Opregion 2.1
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Patch Set 24:

(2 comments)

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

https://review.coreboot.org/c/coreboot/+/52758/comment/c1fe417c_622a3183 
PS19, Line 150: 					*	Physical (2.0) or relative from opregion (2.1+)
> Alignment seems to be off (last tab before the `*` should be a space)

Done

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

https://review.coreboot.org/c/coreboot/+/52758/comment/2e2ddc9e_8c243d48 
PS14, Line 290: CONFIG(INTEL_GMA_OPREGION_2_1)
> Hmm, Opregion 3.0 { .major = 3, .minor = 0 } won't work. […]

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