display: Disable dynamic packet lengths.

Improves compatibility with counterfeit "NRF24L01" chips.

display/firmware/src/radio.rs

             .unwrap();
         nrf24.flush_rx().unwrap();
         nrf24.flush_tx().unwrap();
-        nrf24.set_pipes_rx_lengths(&[Some(32); 6]).unwrap();
+        nrf24.set_pipes_rx_lengths(&[None; 6]).unwrap();
 
         EnabledRadio {
             radio: self,