Macro connect_dummy_rx

macro_rules! connect_dummy_rx {
    ($from:expr, $from_port_name:ident => $engine:expr, $clock:expr, $entity:expr) => { ... };
    ($from:expr, $from_port_name:ident, $from_index:expr => $engine:expr, $clock:expr, $entity:expr) => { ... };
}

Create and connect a dummy RX port