perf time-utils: Simplify perf_time__parse_for_ranges() error paths slightly

commit 2a8afddc upstream.

Simplify perf_time__parse_for_ranges() error paths slightly.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-17-adrian.hunter@intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>