perf expr: Fix copy/paste mistake

Copy/paste leftover from recent refactor.

Fixes: 26226a9 ("perf expr: Move expr lexer to flex")
Signed-off-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Michael Petlan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: olsajiri

tools/perf/util/expr.l

@@ -79,10 +79,10 @@ symbol		{spec}*{sym}*{spec}*{sym}*
 	{
 		int start_token;
 
-		start_token = parse_events_get_extra(yyscanner);
+		start_token = expr_get_extra(yyscanner);
 
 		if (start_token) {
-			parse_events_set_extra(NULL, yyscanner);
+			expr_set_extra(NULL, yyscanner);
 			return start_token;
 		}
 	}