scsi: ufs: Conditionally enable the BLK_MQ_F_BLOCKING flag

Prepare for adding code in ufshcd_queuecommand() that may sleep.

Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230529202640.11883-4-bvanassche@acm.org


Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>