MAC_RFCR
axgbe_printf(1, "MAC RFCR Reg (%08x) = %08x\n", MAC_RFCR,
XGMAC_IOREAD(pdata, MAC_RFCR));
XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, RFE, 0);
XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, RFE, 1);
XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, PFCE, 0);