perf metric: Rename __metricgroup__add_metric to __add_metric

Renaming __metricgroup__add_metric to __add_metric to fit in the current
function names.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200719181320.785305-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/metricgroup.c

@@ -571,10 +571,10 @@ int __weak arch_get_runtimeparam(void)
 	return 1;
 }
 
-static int __metricgroup__add_metric(struct list_head *group_list,
-				     struct pmu_event *pe,
-				     bool metric_no_group,
-				     int runtime)
+static int __add_metric(struct list_head *group_list,
+			struct pmu_event *pe,
+			bool metric_no_group,
+			int runtime)
 {
 	struct egroup *eg;
 
@@ -634,10 +634,7 @@ static int add_metric(struct list_head *group_list,
 	pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
 
 	if (!strstr(pe->metric_expr, "?")) {
-		ret = __metricgroup__add_metric(group_list,
-						pe,
-						metric_no_group,
-						1);
+		ret = __add_metric(group_list, pe, metric_no_group, 1);
 	} else {
 		int j, count;
 
@@ -649,9 +646,7 @@ static int add_metric(struct list_head *group_list,
 		 */
 
 		for (j = 0; j < count && !ret; j++) {
-			ret = __metricgroup__add_metric(
-				group_list, pe,
-				metric_no_group, j);
+			ret = __add_metric(group_list, pe, metric_no_group, j);
 		}
 	}