ENETC_PTCMSDUR
ENETC_PSICFGR0(0), ENETC_PRFSCAPR, ENETC_PTCMSDUR(0),
enetc_port_wr(hw, ENETC_PTCMSDUR(tc), val);
enetc_port_wr(hw, ENETC_PTCMSDUR(tc), ENETC_MAC_MAXFRM_SIZE);
enetc_port_rd(hw, ENETC_PTCMSDUR(tc));
ma = enetc_port_rd(hw, ENETC_PTCMSDUR(prio_top)) * 8;