scsi: core: Use SCSI_SCAN_RESCAN in __scsi_add_device()

Instead of using hardcoded '1' as the __scsi_add_device() ->
scsi_probe_and_add_lun() rescan arg, use proper macro SCSI_SCAN_RESCAN.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20221121121725.1910795-2-john.g.garry@oracle.comReviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/scsi_scan.c

@@ -1580,7 +1580,8 @@ struct scsi_device *__scsi_add_device(struct Scsi_Host *shost, uint channel,
 		scsi_complete_async_scans();
 
 	if (scsi_host_scan_allowed(shost) && scsi_autopm_get_host(shost) == 0) {
-		scsi_probe_and_add_lun(starget, lun, NULL, &sdev, 1, hostdata);
+		scsi_probe_and_add_lun(starget, lun, NULL, &sdev,
+				       SCSI_SCAN_RESCAN, hostdata);
 		scsi_autopm_put_host(shost);
 	}
 	mutex_unlock(&shost->scan_mutex);