Patch merged into coreboot/master: amd/mct/ddr3: Allow critical delay delta to go negative

the following patch was just integrated into master:
commit 5153cbfeb3498b75efdde6c7aa312d5920541702
Author: Timothy Pearson 
Date:   Mon Jan 9 14:10:25 2017 -0600

amd/mct/ddr3: Allow critical delay delta to go negative

The critical delay delta was incorrectly specified as an
    unsigned short.  Use a signed short instead.

Found-by: Coverity Scan #1347355
    Change-Id: I37d769afb8c8af85a0375ae459e9d4ab0adcca74
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/18071
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth 
    Reviewed-by: Paul Menzel 
    Tested-by: Raptor Engineering Automated Test Stand

See https://review.coreboot.org/18071 for details.

-gerrit