[SCSI] libiscsi: pass opcode into alloc_pdu callout

We do not need to allocate a itt for data_out, so this
passes the opcode to the alloc_pdu callout.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 07d9eb1..de5c9b3 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -457,7 +457,7 @@
 	return 0;
 }
 
-static int iscsi_sw_tcp_pdu_alloc(struct iscsi_task *task)
+static int iscsi_sw_tcp_pdu_alloc(struct iscsi_task *task, uint8_t opcode)
 {
 	struct iscsi_tcp_task *tcp_task = task->dd_data;