mmal/codec: Use default input buffer count

As we use packetized input we normally don't need more than a handful of input
buffers. Using the default of mmal, which is 20, seems absolutely sufficient.
Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/hw/mmal/codec.c

@@ -168,7 +168,7 @@ static int OpenDecoder(decoder_t *dec)
         goto out;
     }
     sys->input->buffer_size = sys->input->buffer_size_recommended;
-    sys->input->buffer_num = __MAX(sys->input->buffer_num_recommended, 80);
+    sys->input->buffer_num = sys->input->buffer_num_recommended;
 
     status = mmal_port_enable(sys->input, input_port_cb);
     if (status != MMAL_SUCCESS) {