AETHER-724 Add support of static MAC for UPF interfaces

Change-Id: I46485e90ee4af1cb062d8e3a101237a9be7a1a59
diff --git a/omec/omec-user-plane/values.yaml b/omec/omec-user-plane/values.yaml
index d1bc16c..60f1448 100644
--- a/omec/omec-user-plane/values.yaml
+++ b/omec/omec-user-plane/values.yaml
@@ -71,9 +71,11 @@
     access:
       gateway: 192.168.252.1
       ip: 192.168.252.3/24
+      #mac:
     core:
       gateway: 192.168.250.1
       ip: 192.168.250.3/24
+      #mac:
     cfgFiles:
       upf.json:
         mode: dpdk