TX_RTY_CFG
reg = rt2800_register_read(rt2x00dev, TX_RTY_CFG);
rt2800_register_write(rt2x00dev, TX_RTY_CFG, reg);
reg = rt2800_register_read(rt2x00dev, TX_RTY_CFG);
rt2800_register_write(rt2x00dev, TX_RTY_CFG, reg);