[SCSI] srp_transport: convert to use supported_mode attribute

srp transport works for target drivers without supported_mode
attribute but it would be better to use it explicitly.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/ibmvscsi/ibmvstgt.c b/drivers/scsi/ibmvscsi/ibmvstgt.c
index 3db03dd..82bcab6 100644
--- a/drivers/scsi/ibmvscsi/ibmvstgt.c
+++ b/drivers/scsi/ibmvscsi/ibmvstgt.c
@@ -820,6 +820,7 @@
 	.eh_abort_handler	= ibmvstgt_eh_abort_handler,
 	.shost_attrs		= ibmvstgt_attrs,
 	.proc_name		= TGT_NAME,
+	.supported_mode		= MODE_TARGET,
 };
 
 static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)