ncr53c8xx turn on clustering

Since the driver now supports multiple virtual segments
in an iommu situation, it can also support clustering
for non-iommu systems.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/ncr53c8xx.c

@@ -8633,7 +8633,7 @@ struct Scsi_Host * __init ncr_attach(struct scsi_host_template *tpnt,
 	tpnt->this_id		= 7;
 	tpnt->sg_tablesize	= SCSI_NCR_SG_TABLESIZE;
 	tpnt->cmd_per_lun	= SCSI_NCR_CMD_PER_LUN;
-	tpnt->use_clustering	= DISABLE_CLUSTERING;
+	tpnt->use_clustering	= ENABLE_CLUSTERING;
 
 	if (device->differential)
 		driver_setup.diff_support = device->differential;