stm class: ftrace: Enable supported trace export flag

Set flags for trace_export. Export function trace, event trace
and trace marker to stm.
Reviewed-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NTingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20201005071319.78508-6-alexander.shishkin@linux.intel.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hwtracing/stm/ftrace.c

@@ -46,6 +46,8 @@ static int stm_ftrace_link(struct stm_source_data *data)
 	struct stm_ftrace *sf = container_of(data, struct stm_ftrace, data);
 
 	sf->ftrace.write = stm_ftrace_write;
+	sf->ftrace.flags = TRACE_EXPORT_FUNCTION | TRACE_EXPORT_EVENT
+			| TRACE_EXPORT_MARKER;
 
 	return register_ftrace_export(&sf->ftrace);
 }