scsi: xen-scsifront: remove DISABLE_CLUSTERING

There is no such limitation in the protocol or implementation, so
remove it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/xen-scsifront.c

@@ -696,7 +696,6 @@ static struct scsi_host_template scsifront_sht = {
 	.this_id		= -1,
 	.cmd_size		= sizeof(struct vscsifrnt_shadow),
 	.sg_tablesize		= VSCSIIF_SG_TABLESIZE,
-	.use_clustering		= DISABLE_CLUSTERING,
 	.proc_name		= "scsifront",
 };