Fix initialization order in EtasBus (#1704)

super.__init__ calls set_filters, which is only permissible
after the corresponding structures have been created in the child
constructor. Hence, super.__init__ must be called after the child has
finished initialization. Fixes #1693

can/interfaces/etas/__init__.py

@@ -18,8 +18,6 @@ def __init__(
         data_bitrate: int = 2000000,
         **kwargs: Dict[str, any],
     ):
-        super().__init__(channel=channel, **kwargs)
-
         self.receive_own_messages = receive_own_messages
         self._can_protocol = can.CanProtocol.CAN_FD if fd else can.CanProtocol.CAN_20
 
@@ -119,6 +117,9 @@ def __init__(
 
         self.channel_info = channel
 
+        # Super call must be after child init since super calls set_filters
+        super().__init__(channel=channel, **kwargs)
+
     def _recv_internal(
         self, timeout: Optional[float]
     ) -> Tuple[Optional[can.Message], bool]: