Change in coreboot[master]: drivers/intel/gma: hook up GMA for Skylake+

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/39638 )

Change subject: drivers/intel/gma: hook up GMA for Skylake+
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Patch Set 12:

(1 comment)

https://review.coreboot.org/c/coreboot/+/39638/12//COMMIT_MSG 
Commit Message:

https://review.coreboot.org/c/coreboot/+/39638/12//COMMIT_MSG@11 
PS12, Line 11: TEST=Used GMA functionality (brightness) on a Skylake laptop
How did you test exactly? In your board port, the code for the
queries in `ec.asl` are still commented out and for Linux'
`acpi_video` driver to work, we still need to hook the C code
in `drivers/intel/gma/acpi.c` up (e.g. like CB:32549), which
also requires devicetree ndid/did entries.

There are so many paths of backlight control, I'd like to keep
track which work already.