Add gtppsc in BESS UPF config example

In addition:
- Mention ongoing interface consolidation work

Change-Id: I6a21c9f7858956575520ed04ec9cfba1a864efbb
diff --git a/edge_deployment/bess_upf_deployment.rst b/edge_deployment/bess_upf_deployment.rst
index c29434b..73fae09 100644
--- a/edge_deployment/bess_upf_deployment.rst
+++ b/edge_deployment/bess_upf_deployment.rst
@@ -54,6 +54,11 @@
 it must be forwarded to the UPF's core interface.
 This adds additional routes to the management server and L3 switch.
 
+.. note::
+
+  There is a work-in-progress on interface consolidation in BESS UPF,
+  which will merge `enb`, `access` and `core` into just one interface and
+  simplify the configuration significantly.
 
 Check Cluster Resources
 -----------------------
@@ -118,9 +123,9 @@
      # Add below when connecting to 5G core
      #cfgFiles:
      #  upf.json:
+     #    gtppsc: true
      #    cpiface:
-     #      dnn: "8internet"
-     #      hostname: "upf"
+     #      dnn: "internet" # should match the one configured in ROC
 
 
 Update ``fleet.yaml`` in the same directory to let Fleet use the custom configuration when deploying