[coreboot-gerrit] Patch merged into coreboot/master: nb/amd/mct_ddr3: Work around RDIMM training failure

the following patch was just integrated into master:
commit 31682364ba062fb3cbf4ff3b0ad7cbdb7b5daae1
Author: Timothy Pearson 
Date:   Sat Jan 30 23:34:51 2016 -0600

nb/amd/mct_ddr3: Work around RDIMM training failure

Under certain conditions, not elucidated in the BKDG,
    an extra memclock of CAS write latency is required.

The only reliable way I have found to detect when this
    is required is to try training without the delay, and
    if DQS position training fails, adding the delay and
    retraining.

This is probably related in some form or another to
    the badly broken DQS Write Early algorithm given
    in the BKDG.

Change-Id: Idfaca1b3da3f45793d210980e952ccdfc9ba1410
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/13531
    Tested-by: build bot (Jenkins)
    Tested-by: Raptor Engineering Automated Test Stand 
    Reviewed-by: Martin Roth

See https://review.coreboot.org/13531 for details.

-gerrit