Converts the ch9200 driver to use the module_usb_driver() macro which
makes the code smaller and a bit simpler.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Acked-by: NMatthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>