[VOL-3085]Implement UpdatePmConfig api for voltha-openolt-adapter

Change-Id: Id1f2ae30d7f0d8f4aa4516b96809cf4a1e116dd1
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/pmmetrics/performance_metrics.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/pmmetrics/performance_metrics.go
index b5d9369..322126b 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/pmmetrics/performance_metrics.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/pmmetrics/performance_metrics.go
@@ -58,6 +58,11 @@
 	}
 }
 
+// UpdateFrequency will update the frequency.
+func (pm *PmMetrics) UpdateFrequency(frequency uint32) {
+	pm.frequency = frequency
+}
+
 // Metrics will store the PMMetric params
 func Metrics(pmNames []string) PmMetricsOption {
 	return func(args *PmMetrics) {