Patch merged into coreboot/master: cpu/amd/fam10h-fam15h: Set northbridge throttle values

the following patch was just integrated into master:
commit e536a4d91697fc49d865dfa5065d2cbb31cbc03f
Author: Timothy Pearson 
Date:   Sun Aug 2 21:31:17 2015 -0500

cpu/amd/fam10h-fam15h: Set northbridge throttle values

The existing code did not set the northbridge throttle
    values on Family 15h, leading to sporadic and random
    deadlocks in the crossbar per AMD notes.

Properly set the northbridge throttle values on Family 15h.

Change-Id: I6304b63708c65fedb9c2d46b8c862b7f0adf1102
    Signed-off-by: Timothy Pearson 
    Reviewed-on: http://review.coreboot.org/12025
    Reviewed-by: Alexandru Gagniuc 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/12025 for details.

-gerrit