perf target: Introduce perf_target__parse_uid()

Add and use the modern perf_target__parse_uid() and get rid of the old
parse_target_uid().

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1336367344-28071-5-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-top.c

@@ -1254,8 +1254,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
 
 	perf_target__validate(&top.target);
 
-	top.target.uid = parse_target_uid(top.target.uid_str);
-	if (top.target.uid_str != NULL && top.target.uid == UINT_MAX - 1)
+	if (perf_target__parse_uid(&top.target) < 0)
 		goto out_delete_evlist;
 
 	if (top.target.tid == 0 && top.target.pid == 0 &&