MACSEC_CFG
nxp_c45_macsec_read(phydev, MACSEC_CFG, ®);
nxp_c45_macsec_write(phydev, MACSEC_CFG, reg);
nxp_c45_macsec_read(phydev, MACSEC_CFG, ®);
nxp_c45_macsec_write(phydev, MACSEC_CFG, reg);