perf hists: Introduce perf_evsel__output_resort function

Adding evsel specific function to sort hists_evsel based hists. The
hists__output_resort can be now used to sort common hists object.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1453109064-1026-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 72ed0b4..54ce047 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -507,7 +507,7 @@
 	ui_progress__init(&prog, rep->nr_entries, "Sorting events for output...");
 
 	evlist__for_each(rep->session->evlist, pos)
-		hists__output_resort(evsel__hists(pos), &prog);
+		perf_evsel__output_resort(pos, &prog);
 
 	ui_progress__finish();
 }