target: Remove unused wait_for_tasks bit in target_wait_for_sess_cmds

Drop unused transport_wait_for_tasks() check in target_wait_for_sess_cmds
shutdown code, and convert tcm_qla2xxx + ib_srpt fabric drivers.

Cc: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index b08ca7a..564024e 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -2328,7 +2328,7 @@
 	se_sess = ch->sess;
 	BUG_ON(!se_sess);
 
-	target_wait_for_sess_cmds(se_sess, 0);
+	target_wait_for_sess_cmds(se_sess);
 
 	transport_deregister_session_configfs(se_sess);
 	transport_deregister_session(se_sess);