Patch merged into coreboot/master: nb/intel/x4x: Implement resume from S3 suspend

the following patch was just integrated into master:
commit ef7e98a2ac3449bc6a8d0cc73d7b54d41bc8bfa8
Author: Arthur Heymans 
Date:   Fri Dec 30 21:07:18 2016 +0100

nb/intel/x4x: Implement resume from S3 suspend

It rewrites the results of receive enable stored in the upper nvram
    region, to avoid running receive enable again.

Some debug info is also printed about the self-refresh registers.
    (Not enforcing a reset here, since 0 does not necessarily mean it's
    not in self-refresh).

Change-Id: Ib54bc5c7b0fed6d975ffc31f037b5179d9e5600b
    Signed-off-by: Arthur Heymans 
    Reviewed-on: https://review.coreboot.org/17998
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/17998 for details.

-gerrit