Change in coreboot[master]: nb/intel/*/gma: Port ACPI opregion to older platforms

[Patrick Rudolph (Code Review)]

Hello Arthur Heymans, build bot (Jenkins),

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

https://review.coreboot.org/21766

to look at the new patch set (#2).

Change subject: nb/intel/*/gma: Port ACPI opregion to older platforms
......................................................................

nb/intel/*/gma: Port ACPI opregion to older platforms

Port the ACPI opregion implementation that resides in
drivers/intel/gma to older platforms.

It allows to include a vbt.bin and allows GNU/Linux to load the
opregion as ASLS is being set.

Windows' Intel will likely ignore it as it relies on legacy VBIOS
to be loaded at 0xc0000.

Tested successfully on DG43GT (x4x) with vbt.bin,
with X200 (gm45) with vendor option rom and
D45GCLF (i945) with fake vbt.

Change-Id: I1896411155592b343e48cbd116e2f70fb0dbfafa
Signed-off-by: Patrick Rudolph 
---
M src/northbridge/intel/gm45/gma.c
M src/northbridge/intel/i945/gma.c
M src/northbridge/intel/x4x/gma.c
3 files changed, 158 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/21766/2