BCE_EMAC_RX_MODE
BCE_SETBIT(sc, BCE_EMAC_RX_MODE, BCE_EMAC_RX_MODE_FLOW_EN);
BCE_CLRBIT(sc, BCE_EMAC_RX_MODE, BCE_EMAC_RX_MODE_FLOW_EN);
REG_WR(sc, BCE_EMAC_RX_MODE, rx_mode);