TXRX_CSR5
reg = rt2500usb_register_read(rt2x00dev, TXRX_CSR5);
rt2500usb_register_write(rt2x00dev, TXRX_CSR5, reg);
rt2x00mmio_register_write(rt2x00dev, TXRX_CSR5,
rt2x00usb_register_write(rt2x00dev, TXRX_CSR5,