iscsit: use the itt_t abstract type

Use the special itt_t type defined by the iscsi headers and the initiator
to make sure it's an opaque value.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/iscsi/iscsi_target_erl1.h

@@ -7,8 +7,8 @@ extern int iscsit_create_recovery_datain_values_datasequenceinorder_yes(
 extern int iscsit_create_recovery_datain_values_datasequenceinorder_no(
 			struct iscsi_cmd *, struct iscsi_datain_req *);
 extern int iscsit_handle_recovery_datain_or_r2t(struct iscsi_conn *, unsigned char *,
-			u32, u32, u32, u32);
-extern int iscsit_handle_status_snack(struct iscsi_conn *, u32, u32,
+			itt_t, u32, u32, u32);
+extern int iscsit_handle_status_snack(struct iscsi_conn *, itt_t, u32,
 			u32, u32);
 extern int iscsit_handle_data_ack(struct iscsi_conn *, u32, u32, u32);
 extern int iscsit_dataout_datapduinorder_no_fbit(struct iscsi_cmd *, struct iscsi_pdu *);