[coreboot-gerrit] Patch merged into coreboot/master: gm45/gma.c: clean up some registers

the following patch was just integrated into master:
commit 8ba2010d126ce7a6d32504bcb2a0e1b231732c0f
Author: Arthur Heymans 
Date:   Mon Aug 15 00:04:34 2016 +0200

gm45/gma.c: clean up some registers

According to "G45: Volume 3: Display Register
    Intel ® 965G Express Chipset Family and Intel ®
    G35 Express Chipset Graphics Controller" some registries
    are set incorrectly in gm45/gma.c.

Some values are changed after comparing them with the values
    the i915 linux kernel (3.13 was used) module sets while modesetting.
    The values were obtained using 'intel_reg' from intel-gpu-tools,
    during a normal boot and with 'nomodeset' as a kernel argument.

Some registers that don't exist on gm45 are set in gma.c, which is
    probably the result of copying code from a more recent intel
    northbridge.

The result is that that gm45 laptops with wxga displays still work as
    before. gm45 laptops with wxga+ or higher resolution now just work,
    where previously a black screen was shown.

TEST: build with native graphic init and flash on a gm45 target, like
    lenovo x200.

Change-Id: If66b60c7189997c558270f9e474851fe7e2219f1
    Signed-off-by: Arthur Heymans 
    Reviewed-on: https://review.coreboot.org/16217
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber

See https://review.coreboot.org/16217 for details.

-gerrit