Patch merged into coreboot/master: nb/amd/mct_ddr3: Fix x4 DIMM receiver enable training on Fam15h

the following patch was just integrated into master:
commit 7f731f8d4f0d4dbc109869032f4e993995eac045
Author: Timothy Pearson 
Date:   Fri Apr 29 00:38:29 2016 -0500

nb/amd/mct_ddr3: Fix x4 DIMM receiver enable training on Fam15h

The existing Family 15h receiver enable training code stored
    temporary delay values in the wrong variables, leading to
    the requisite averaging of delays across nibbles not being
    applied.  This in turn made x4 DIMMs less stable than they
    should have been.

Store temporary nibble delay values in a dedicated array.

Change-Id: Ic5da898af7d689db4110211f89b886ccdbb5f78f
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/14541
    Tested-by: build bot (Jenkins)
    Tested-by: Raptor Engineering Automated Test Stand 
    Reviewed-by: Martin Roth

See https://review.coreboot.org/14541 for details.

-gerrit