tracing/events: move the ftrace event tracing code to core

This patch moves the ftrace creation into include/trace/ftrace.h and
simplifies the work of developers in adding new tracepoints.
Just the act of creating the trace points in include/trace and including
define_trace.h will create the events in the debugfs/tracing/events
directory.

This patch removes the need of include/trace/trace_events.h

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h
index de9dc7d..980eb66 100644
--- a/include/trace/define_trace.h
+++ b/include/trace/define_trace.h
@@ -56,6 +56,10 @@
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
+#ifdef CONFIG_EVENT_TRACER
+#include <trace/ftrace.h>
+#endif
+
 #undef TRACE_HEADER_MULTI_READ
 
 /* Only undef what we defined in this file */