utils: Fix mux_gen.py not include parent.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

v2x/lib/mux.py

diff --git a/v2x/lib/mux.py b/v2x/lib/mux.py
index d92351b..372db92 100644
--- a/v2x/lib/mux.py
+++ b/v2x/lib/mux.py
@@ -188,8 +188,8 @@
                     'delay_constant',
                     {
                         'max': "10e-12",
-                        'in_port': "%s.%s" % (mux_name, inport.name),
-                        'out_port': "%s.%s" % (mux_name, outport.name),
+                        'in_port': "%s" % inport.name,
+                        'out_port': "%s" % outport.name,
                     },
                 )
     elif mux_type == MuxType.ROUTING: