Patch merged into coreboot/master: northbridge/amd/amdfam10: Fix poor performance on Family 15h CPUs

the following patch was just integrated into master:
commit 4dc6cabd368f4667c5f96e042daab71d530ac663
Author: Timothy Pearson 
Date:   Fri Aug 7 19:06:09 2015 -0500

northbridge/amd/amdfam10: Fix poor performance on Family 15h CPUs

Change-Id: I193749bc767b7c1139de7cd67622a7b03298009b
    Signed-off-by: Timothy Pearson 
    Reviewed-on: http://review.coreboot.org/12031
    Tested-by: build bot (Jenkins)
    Reviewed-by: Felix Held

See http://review.coreboot.org/12031 for details.

-gerrit