scsi: ufs: Override auto suspend tunables for ufs

Override auto suspend tunables for UFS device LUNs during
initialization so as to efficiently manage background operations
and the power consumption.

Change-Id: Id7ff9e8a5c83b7503a329e71936af3234a22895b
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>