[coreboot] Patch merged into coreboot/master: a54defe AMD Agesa and GFXUMA: drop use of uma_memory_base

the following patch was just integrated into master:
commit a54defe30fa86f01a1b02907594ef4a08217544b
Author: Kyösti Mälkki 
Date:   Fri Jul 20 08:31:37 2012 +0300

AMD Agesa and GFXUMA: drop use of uma_memory_base

Without GFXUMA, variables were not referenced anywhere.
    Fail builds on Family10 if GFXUMA is selected, because the northbridge
    code does not set UMA base or size.

Change-Id: I15b91cf6241e9a890398eed03824b753828a0a51
    Signed-off-by: Kyösti Mälkki

Build-Tested: build bot (Jenkins) at Thu Aug  2 11:50:32 2012, giving +1
Reviewed-By: Anton Kochkov  at Thu Aug  2 12:55:25 2012, giving +2
See http://review.coreboot.org/1247 for details.

-gerrit