Disable server controller if --no-control

If --no-control is disabled, there is no need for a controller.

It also avoids to power on the device on start if control is disabled.

app/src/server.h

@@ -35,6 +35,7 @@ struct server_params {
     uint16_t max_size;
     uint32_t bit_rate;
     bool send_frame_meta;
+    bool control;
 };
 
 // init default values