MAC_Q0TFCR
reg = MAC_Q0TFCR;
XGMAC_SET_BITS(reg_val, MAC_Q0TFCR, TFE, 0);
reg = MAC_Q0TFCR;
XGMAC_SET_BITS(reg_val, MAC_Q0TFCR, TFE, 1);
XGMAC_SET_BITS(reg_val, MAC_Q0TFCR, PT, 0xffff);
reg = MAC_Q0TFCR;
reg = MAC_Q0TFCR;