perf evsel: Rename struct perf_evsel to struct evsel

Rename struct perf_evsel to struct evsel, so we don't have a name clash
when we add struct perf_evsel in libperf.

Committer notes:

Added fixes for arm64, provided by Jiri.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/top.h

@@ -10,7 +10,7 @@
 #include <sys/ioctl.h>
 
 struct perf_evlist;
-struct perf_evsel;
+struct evsel;
 struct perf_session;
 
 struct perf_top {
@@ -33,7 +33,7 @@ struct perf_top {
 	bool		   vmlinux_warned;
 	bool		   dump_symtab;
 	struct hist_entry  *sym_filter_entry;
-	struct perf_evsel  *sym_evsel;
+	struct evsel 	   *sym_evsel;
 	struct perf_session *session;
 	struct winsize	   winsize;
 	int		   realtime_prio;