interconnect/axi/axi_stream: Add clock_domain parameters.

Useful for wrapping IP and do checks or decide if CDC has to be inserted.

litex/soc/interconnect/axi/axi_stream.py

@@ -17,12 +17,13 @@ from litex.soc.interconnect.axi.axi_common import *
 # AXI-Stream Definition ----------------------------------------------------------------------------
 
 class AXIStreamInterface(stream.Endpoint):
-    def __init__(self, data_width=0, keep_width=None, id_width=0, dest_width=0, user_width=0, layout=None, name=None):
+    def __init__(self, data_width=0, keep_width=None, id_width=0, dest_width=0, user_width=0, clock_domain="sys", layout=None, name=None):
         self.data_width   = data_width
         self.keep_width   = data_width//8 if keep_width is None else keep_width
         self.id_width     = id_width
         self.dest_width   = dest_width
         self.user_width   = user_width
+        self.clock_domain = clock_domain
 
         # Define Payload Layout.
         if layout is not None: