cuda: remove GET_6805_ADDR command

It doesn't seem to be used, and operating systems should accept a 'unknown command' answer.
Signed-off-by: NHervé Poussineau <hpoussin@reactos.org>
Reviewed-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/misc/macio/cuda.c

@@ -733,9 +733,6 @@ static void cuda_receive_packet(CUDAState *s,
     }
 
     switch(data[0]) {
-    case CUDA_GET_6805_ADDR:
-        cuda_send_packet_to_host(s, obuf, 3);
-        return;
     case CUDA_COMBINED_FORMAT_IIC:
         obuf[0] = ERROR_PACKET;
         obuf[1] = 0x5;