Patch merged into coreboot/master: nb/gm45, x4x/gma.c: Compute p2 in VGA init instead of hardcoding it

the following patch was just integrated into master:
commit 063cd5f6eee0ad9416e62eac4a168591220f53d0
Author: Arthur Heymans 
Date:   Wed Oct 12 00:05:00 2016 +0200

nb/gm45,x4x/gma.c: Compute p2 in VGA init instead of hardcoding it

According to: "Intel ® 965 Express Chipset Family and Intel ® G35 Express
    Chipset Graphics Controller PR" the p2 divisor needs to be 10 when the
    dotclock is below 225MHz and 5 when its above 225MHz.

Change-Id: I363039b6fd92051c4be4fdc88788f27527645944
    Signed-off-by: Arthur Heymans 
    Reviewed-on: https://review.coreboot.org/16991
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber

See https://review.coreboot.org/16991 for details.

-gerrit