scsi: iscsi: Drop temp workq_name

When the workqueue code was created it didn't allow variable args so we
have been using a temp buffer. Drop that.

Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Chris Leech <[e-mail]>
Reviewed-by: Lee Duncan <[e-mail]>
Signed-off-by: Mike Christie <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/libiscsi.c

···
 	ihost = shost_priv(shost);
 
 	if (xmit_can_sleep) {
-		snprintf(ihost->workq_name, sizeof(ihost->workq_name),
-			"iscsi_q_%d", shost->host_no);
-		ihost->workq = alloc_workqueue("%s",
+		ihost->workq = alloc_workqueue("iscsi_q_%d",
 			WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
-			1, ihost->workq_name);
+			1, shost->host_no);
 		if (!ihost->workq)
 			goto free_host;
 	}

include/scsi/libiscsi.h

···
 	int			state;
 
 	struct workqueue_struct	*workq;
-	char			workq_name[20];
 };
 
 /*