Patch merged into coreboot/master: Revert "google/oak: increase the driving strength for 4GB DRAMs"

the following patch was just integrated into master:
commit b431a51086f89e74aa681b61744bc312255b6cb4
Author: Nicolas Boichat 
Date:   Wed Dec 14 17:26:12 2016 +0800

Revert "google/oak: increase the driving strength for 4GB DRAMs"

This reverts commit 34a6537512d412363bf56428b7ae284e6dd80fb3, which
    appears to cause random stability issues on some elm units.

BRANCH=oak
    BUG=chrome-os-partner:60869
    BUG=chromium:673349
    TEST=None

Change-Id: I5ce9e2673db1bc7a1f487a3c3bcce4651a5e3567
    Reviewed-on: https://chromium-review.googlesource.com/419862
    Commit-Ready: Nicolas Boichat 
    Tested-by: Nicolas Boichat 
    Reviewed-by: Julius Werner 
    Reviewed-on: https://review.coreboot.org/18005
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/18005 for details.

-gerrit