perf evsel: Rename perf_evsel__is_*() to evsel__is*()

As those are 'struct evsel' methods, not part of tools/lib/perf/, aka
libperf, to whom the perf_ prefix belongs.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 7d03563..dc3342f 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1191,7 +1191,7 @@ static struct disasm_line *disasm_line__new(struct annotate_args *args)
 	struct disasm_line *dl = NULL;
 	int nr = 1;
 
-	if (perf_evsel__is_group_event(args->evsel))
+	if (evsel__is_group_event(args->evsel))
 		nr = args->evsel->core.nr_members;
 
 	dl = zalloc(disasm_line_size(nr));
@@ -1437,7 +1437,7 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
 		if (queue)
 			return -1;
 
-		if (perf_evsel__is_group_event(evsel))
+		if (evsel__is_group_event(evsel))
 			width *= evsel->core.nr_members;
 
 		if (!*al->line)
@@ -2368,7 +2368,7 @@ int symbol__annotate_printf(struct map_symbol *ms, struct evsel *evsel,
 
 	len = symbol__size(sym);
 
-	if (perf_evsel__is_group_event(evsel)) {
+	if (evsel__is_group_event(evsel)) {
 		width *= evsel->core.nr_members;
 		evsel__group_desc(evsel, buf, sizeof(buf));
 		evsel_name = buf;
@@ -2518,7 +2518,7 @@ int map_symbol__annotation_dump(struct map_symbol *ms, struct evsel *evsel,
 	if (fp == NULL)
 		goto out_free_filename;
 
-	if (perf_evsel__is_group_event(evsel)) {
+	if (evsel__is_group_event(evsel)) {
 		evsel__group_desc(evsel, buf, sizeof(buf));
 		ev_name = buf;
 	}
@@ -3064,7 +3064,7 @@ int symbol__annotate2(struct map_symbol *ms, struct evsel *evsel,
 	if (notes->offsets == NULL)
 		return ENOMEM;
 
-	if (perf_evsel__is_group_event(evsel))
+	if (evsel__is_group_event(evsel))
 		nr_pcnt = evsel->core.nr_members;
 
 	err = symbol__annotate(ms, evsel, options, parch);