Need to save EmcBctSpare2 field to scratch register. Without it, system may not resume from LP0 suspend. BUG=chrome-os-partner:43797 BRANCH=none TEST=able to suspend/resume >30 times on a known failed board Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Original-Commit-Id: 6d1623c4c791f79e097193dfbc4bc894ef63e230 Original-Change-Id: I53ebf8c4d4c7cd19827128a84fbd97a377d78ff7 Original-Signed-off-by: Yen Lin <yelin@nvidia.com> Original-Reviewed-on: https://chromium-review.googlesource.com/294765 Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org> Original-(cherry picked from commit ce38d902e889068d0068150c9352c2ecdb2f8815) Original-Reviewed-on: https://chromium-review.googlesource.com/294864 Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org> Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org> Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Change-Id: I2ff21afbe9278413033101877c2581df51913709 Reviewed-on: http://review.coreboot.org/11401 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>