Change in coreboot[master]: drivers/nvidia/optimus: Write _ROM method

[Benjamin Doron (Code Review)]

Hello build bot (Jenkins), Patrick Georgi, Martin Roth, Patrick Rudolph, Evgeny Zinoviev,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/43074

to look at the new patch set (#4).

Change subject: drivers/nvidia/optimus: Write _ROM method
......................................................................

drivers/nvidia/optimus: Write _ROM method

Make OptionROM available to an OS driver, which may require the
configuration data contained within. This may be required for GPUs that
do not contain their vBIOS, or perhaps the drivers require it in this
form/fashion.

Working on an Acer Aspire VN7-572G (Skylake-U). nouveau successfully
obtains the vBIOS via ACPI.

Example:

Kconfig:
  select DRIVERS_NVIDIA_OPTIMUS

devicetree.cb:
  device pci 1c.0 on
    chip drivers/nvidia/optimus
      device pci 00.0 on end
    end
  end

Change-Id: Ida87aebf8fdf341ab350c2bb3704d2ef695cf8f0
Signed-off-by: Benjamin Doron 
---
A src/drivers/nvidia/optimus/Makefile.inc
A src/drivers/nvidia/optimus/optimus_vbios.c
2 files changed, 50 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/43074/4