VOL-1711 Downstream gem port attr list to be used for downward HSIA flow

Change-Id: I61a7c03e989b051c93bb68c31215bb2a6c3c79bf
diff --git a/adaptercore/openolt_flowmgr.go b/adaptercore/openolt_flowmgr.go
index 55fd1df..305f6af 100644
--- a/adaptercore/openolt_flowmgr.go
+++ b/adaptercore/openolt_flowmgr.go
@@ -1541,7 +1541,7 @@
 		log.Info("Adding Downstream data rule")
 		if pcp, ok := classifierInfo[VlanPcp]; ok {
 			gemPort = f.techprofile[intfID].GetGemportIDForPbit(TpInst,
-				tp_pb.Direction_UPSTREAM,
+				tp_pb.Direction_DOWNSTREAM,
 				pcp.(uint32))
 			//Adding HSIA downstream flow
 			f.addDownstreamDataFlow(intfID, onuID, uniID, portNo, classifierInfo, actionInfo, flow, allocID[0], gemPort)