[ONOS-6681] Port statistics discovery Cisco REST driver

Change-Id: Icccf6e2e57e0d0f7c6c7f2f09b99c4ed89081ed6
diff --git a/drivers/cisco/rest/src/main/resources/cisco-rest-drivers.xml b/drivers/cisco/rest/src/main/resources/cisco-rest-drivers.xml
index 9b8abdf..263e15d 100644
--- a/drivers/cisco/rest/src/main/resources/cisco-rest-drivers.xml
+++ b/drivers/cisco/rest/src/main/resources/cisco-rest-drivers.xml
@@ -18,5 +18,7 @@
     <driver name="cisco-rest" manufacturer="Cisco" hwVersion="" swVersion="NXOS">
         <behaviour api="org.onosproject.net.device.DeviceDescriptionDiscovery"
                    impl="org.onosproject.drivers.cisco.rest.CiscoNxosDeviceDescription"/>
+        <behaviour api="org.onosproject.net.device.PortStatisticsDiscovery"
+                   impl="org.onosproject.drivers.cisco.rest.CiscoNxosPortStatistics"/>
     </driver>
 </drivers>