Change in coreboot[master]: drivers/gfx/nvidia: Add driver for NVIDIA Optimus

[Michael Niewöhner (Code Review)]

Attention is currently required from: Tim Crawford, Nico Huber, Jeremy Soller, Tim Wawrzynczak, Paul Menzel, Angel Pons.
Michael Niewöhner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/57034 )

Change subject: drivers/gfx/nvidia: Add driver for NVIDIA Optimus
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Patch Set 2:

(3 comments)

File src/drivers/gfx/nvidia/acpi/gpu.asl:

https://review.coreboot.org/c/coreboot/+/57034/comment/c86bbf62_dc9cd124 
PS2, Line 95: 				Debug = "    DGPU_PWR_EN high"
I would use Printf for debug output; but that's just personal preference

https://review.coreboot.org/c/coreboot/+/57034/comment/44ce1c40_87ba4c42 
PS2, Line 160: Zero
0

https://review.coreboot.org/c/coreboot/+/57034/comment/0a687461_b13fac02 
PS2, Line 184: Zero
0