staging: vt6656: turn radio off after mac registered.

Turn the radio off to save power is the device is unused
on system.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/main_usb.c

@@ -1074,6 +1074,8 @@ int vnt_init(struct vnt_private *priv)
 
 	priv->mac_hw = true;
 
+	vnt_radio_power_off(priv);
+
 	return 0;
 }