Disable multiUpfs from OMEC charts by default

Change-Id: Id3760e809cfe275f862b3ce7e2a0d13e7bc9ac87
diff --git a/omec/omec-control-plane/values.yaml b/omec/omec-control-plane/values.yaml
index f94085a..9d3263e 100644
--- a/omec/omec-control-plane/values.yaml
+++ b/omec/omec-control-plane/values.yaml
@@ -236,7 +236,7 @@
     # ZMQ mode is used for cp-dp communication when multiple UPFs is set
     # Otherwise, direct UDP mode is used
     # Note that enabling NodePort is valid only in direct UDP mode
-    multiUpfs: true
+    multiUpfs: false
     cpComm:
       nodePort:
         enabled: false