tracing/events: call the correct event trace selftest init function

The late_initcall calls a helper function instead of the proper
init event selftest function.

This update may have been lost due to conflicting merges.

[ Impact: fix compiler warning and call extended event trace self tests ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace_events.c

@@ -1199,6 +1199,6 @@ static __init int event_trace_self_tests_init(void)
 	return 0;
 }
 
-late_initcall(event_trace_self_tests);
+late_initcall(event_trace_self_tests_init);
 
 #endif