armv7/exynos: Fix and remove memory reset workarounds

The memory corruption problem in Exynos suspend/resume process is caused by two
things together: PHY_RESET and MRS command.

After stop sending MRS on resume, we can now remove the workaround of skipping
PHY_RESET.

Change-Id: I64acc27c1d2bb549ae6ad7d32ecda94b0355972c
Reviewed-on: https://gerrit.chromium.org/gerrit/64736
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/4433
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
3 files changed