perf stat: Use 'evsel->evlist' instead of 'evsel_list' in collect_all_aliases()

perf stat: Use 'evsel->evlist' instead of 'evsel_list' in collect_all_aliases()

Use 'evsel->evlist' instead of 'evsel_list' in collect_all_aliases(), to
get rid of the global 'evsel_list' variable dependency.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180830063252.23729-27-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>