Patch merged into coreboot/master: fcfe67c haswell: add option to mark graphics memory write-combining.

the following patch was just integrated into master:
commit fcfe67c3b2b3391a8131eb26cc546a9afaa28822
Author: Aaron Durbin 
Date:   Fri Mar 22 22:23:05 2013 -0500

haswell: add option to mark graphics memory write-combining.

The graphics memory can be accessed in a faster manner by
    setting it to write-combing mode. Add an option to enable
    write-combining for the graphics memory.

Change-Id: I797fcd9f0dfb074f9e45476773acbfe614eb4b0a
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/2893
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

Build-Tested: build bot (Jenkins) at Fri Mar 29 08:21:28 2013, giving +1
Reviewed-By: Stefan Reinauer  at Fri Mar 29 20:00:25 2013, giving +2
See http://review.coreboot.org/2893 for details.

-gerrit