target: make queue_tm_rsp() return void

The return value wasn't checked by any of the callers.  Assuming this is
correct behaviour, we can simplify some code by not bothering to
generate it.

nab: Add srpt_queue_data_in() + srpt_queue_tm_rsp() nops around
     srpt_queue_response() void return

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c
index d3536f5..e51b09a 100644
--- a/drivers/target/sbp/sbp_target.c
+++ b/drivers/target/sbp/sbp_target.c
@@ -1842,9 +1842,8 @@
 	return sbp_send_sense(req);
 }
 
-static int sbp_queue_tm_rsp(struct se_cmd *se_cmd)
+static void sbp_queue_tm_rsp(struct se_cmd *se_cmd)
 {
-	return 0;
 }
 
 static int sbp_check_stop_free(struct se_cmd *se_cmd)