Revert "scsi: ufs: disable ah8 during suspend and enable it on resume"

This reverts commit 33ee9fb70181 ("scsi: ufs: disable ah8 during
suspend and enable it on resume"). There is a race condition
between disabling AH8 and HW initiated AH8 enter/exit causing
DME errors on next command transfer. Revert this change until
the issue is fixed.

Change-Id: Iece1266b345a09cae3f8de6b4780340515c19c4a
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
[cang@codeaurora.org: resolved trivial merge conflicts]
Signed-off-by: Can Guo <cang@codeaurora.org>