scsi: ufs: keep auto-bkops enabled after resume if urgent bkops needed

If device bkops status shows that its in critical need of executing
background operations, host should allow the device to continue doing
background operations. But UFS host driver's runtime/system resume
callbacks disable the auto-bkops irrespective of current bkops status
of device. This change fixes the above issue.

Change-Id: I9446ecc8e4016b6d93a2c620edb4512a91660ac7
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>