Change in coreboot[master]: drivers/gfx/nvidia: Add Optimus driver based on Intel PCIe RTD3

[Jeremy Soller (Code Review)]

Attention is currently required from: Tim Wawrzynczak, Michał Kopeć, Michael Niewöhner.
Jeremy Soller has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62496 )

Change subject: drivers/gfx/nvidia: Add Optimus driver based on Intel PCIe RTD3
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Patch Set 3: Code-Review-1

(1 comment)

File src/drivers/gfx/nvidia/optimus/optimus.c:

https://review.coreboot.org/c/coreboot/+/62496/comment/0d5b6ddb_1e62f954 
PS3, Line 195: 	if (config->enable_gpio.pin_count) {
A GC6 compliant driver must be able to handle the JT DSM methods and decide to skip turning off power (only doing reset instead) in a few special cases, such as needing to use video memory self-refresh. This driver currently does not handle this.