CD1400_COR3
cd_write_reg(sc, cy->cy_chip, CD1400_COR3, CY_RX_FIFO_THRESHOLD);
cd1400_write_reg(cd, CD1400_COR3, MTTY_RX_FIFO_THRESHOLD);
cd1400_write_reg(cd, CD1400_COR3, MBPP_RX_FIFO_THRESHOLD);