Fix confusing logs on tenant network configuration

port like obj can be passed to smartnic checker while it's not aware
of portgroups, giving a confusing log of unknown port data.

Change-Id: Ia9d1ef48ebcf0cc1f1a987fd02f2dd7e74b96271

ironic/common/neutron.py

@@ -823,6 +823,9 @@ def is_smartnic_port(port_data):
     if isinstance(port_data, dict):
         return port_data.get('is_smartnic', False)
 
+    if isinstance(port_data, objects.Portgroup):
+        return False
+
     LOG.warning('Unknown port data type: %(type)s', {'type': type(port_data)})
     return False