soc/interconnect/stream: set packetized to True by default (we are going to remove this parameter)

litex/soc/interconnect/stream.py

@@ -14,7 +14,7 @@ def _make_m2s(layout):
 
 
 class EndpointDescription:
-    def __init__(self, payload_layout, param_layout=[], packetized=False):
+    def __init__(self, payload_layout, param_layout=[], packetized=True):
         self.payload_layout = payload_layout
         self.param_layout = param_layout
         self.packetized = packetized