scsi: scsi_transport_fc: Use %u for dev_loss_tmo

dev_loss_tmo is an unsigned value. Using "%d" as output format causes
irritating negative values to be shown in sysfs.

Link: https://lore.kernel.org/r/20220902131519.16513-1-mwilck@suse.com
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/scsi_transport_fc.c

@@ -1170,7 +1170,7 @@ static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 	return 0;
 }
 
-fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
+fc_rport_show_function(dev_loss_tmo, "%u\n", 20, )
 static ssize_t
 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 			    const char *buf, size_t count)