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

[Angel Pons (Code Review)]

Attention is currently required from: Tim Crawford, Nico Huber, Jeremy Soller, Tim Wawrzynczak, Paul Menzel, Michael Niewöhner.
Angel Pons 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:

(1 comment)

File src/drivers/gfx/nvidia/chip.h:

https://review.coreboot.org/c/coreboot/+/57034/comment/9b57f2aa_8c280f23 
PS2, Line 7: 	/* TODO: Set GPIOs in devicetree? */
> yup. […]

It would also be very useful to generate the Optimus ACPI code using the SSDT generator.

The power control sequences for SA PEG and PCH PCIe are different, but it should be possible to generate a SSDT to handle this using information from the devicetree.