Revert "scsi: ufs: Disable blk-mq for now"

This reverts commit d87161be.

The issues that forced us to disable blk_mq for ufs have been resolved.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -8099,13 +8099,6 @@ int ufshcd_alloc_host(struct device *dev, struct ufs_hba **hba_handle)
 		err = -ENOMEM;
 		goto out_error;
 	}
-
-	/*
-	 * Do not use blk-mq at this time because blk-mq does not support
-	 * runtime pm.
-	 */
-	host->use_blk_mq = false;
-
 	hba = shost_priv(host);
 	hba->host = host;
 	hba->dev = dev;