perf_counter tools: Add 'perf list' to list available events

perf list: List all the available event types which can be used in
-e (--event) options.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Documentation/perf_counter/util/parse-events.h b/Documentation/perf_counter/util/parse-events.h
index 542971c..e3d5529 100644
--- a/Documentation/perf_counter/util/parse-events.h
+++ b/Documentation/perf_counter/util/parse-events.h
@@ -13,5 +13,5 @@
 
 #define EVENTS_HELP_MAX (128*1024)
 
-extern void create_events_help(char *help_msg);
+extern void print_events(void);