scsi: ufs: reduce auto hibern8 timeout to save power

The PA_Hibern8Time and PA_TActivate time in most devices are well
under 1ms combined thereby the overall hibern8 enter/exit latencies
are under 1ms as well. Entering hibern8 as soon as possible saves
power consumption, hence reduce the auto hibern8 timeout to 1ms.

Change-Id: If58590fc397ec8eb88906c103247bb48710805db
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>