scsi: be2iscsi: Replace spin_unlock_bh with spin_lock

spin_unlock_bh back_lock is used in beiscsi_eh_device_reset instead of
spin_lock.
Signed-off-by: NJitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: NTomas Henzl <thenzl@redhat.com>
Reviewed-by: NChris Leech <cleech@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_main.c

@@ -337,7 +337,7 @@ static int beiscsi_eh_device_reset(struct scsi_cmnd *sc)
 		inv_tbl->task[nents] = task;
 		nents++;
 	}
-	spin_unlock_bh(&session->back_lock);
+	spin_unlock(&session->back_lock);
 	spin_unlock_bh(&session->frwd_lock);
 
 	rc = SUCCESS;