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

[Krystian Hebel (Code Review)]

Attention is currently required from: Tim Crawford, Michał Żygowski, Jeremy Soller, Tim Wawrzynczak, Michał Kopeć.
Krystian Hebel 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 5:

(3 comments)

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

https://review.coreboot.org/c/coreboot/+/62496/comment/39ec2bb8_8922a763 
PS5, Line 88: windows
Windows

https://review.coreboot.org/c/coreboot/+/62496/comment/e9f8a7ed_336add04 
PS5, Line 137: 	if (config->reset_gpio.pin_count) {
I haven't seen the specification for this device, but shouldn't there be a delay between enabling clocks and de-asserting reset signal?

https://review.coreboot.org/c/coreboot/+/62496/comment/c1585144_4f078f4f 
PS5, Line 261: 	const struct opregion rp_pci_config = OPREGION("PXCS", SYSTEMMEMORY, CONFIG_ECAM_MMCONF_BASE_ADDRESS | (parent->path.pci.devfn << 12), 0x1000);
Please split this line.