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>
diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c
index 3df8a2c..21f29d9 100644
--- a/drivers/target/iscsi/iscsi_target_erl1.c
+++ b/drivers/target/iscsi/iscsi_target_erl1.c
@@ -466,7 +466,7 @@
 int iscsit_handle_recovery_datain_or_r2t(
 	struct iscsi_conn *conn,
 	unsigned char *buf,
-	u32 init_task_tag,
+	itt_t init_task_tag,
 	u32 targ_xfer_tag,
 	u32 begrun,
 	u32 runlength)
@@ -498,7 +498,7 @@
 /* #warning FIXME: Status SNACK needs to be dependent on OPCODE!!! */
 int iscsit_handle_status_snack(
 	struct iscsi_conn *conn,
-	u32 init_task_tag,
+	itt_t init_task_tag,
 	u32 targ_xfer_tag,
 	u32 begrun,
 	u32 runlength)