VR_BCR1
VR_CLRBIT(sc, VR_BCR1, VR_BCR1_TX_THRESH);
VR_SETBIT(sc, VR_BCR1, vr_tx_threshold_tables[sc->vr_txthresh].bcr_cfg);
VR_CLRBIT(sc, VR_BCR1, VR_BCR1_VLANFILT_ENB);