PHY_ANAR_100BT4
if (advert & PHY_ANAR_100BT4 && ability & PHY_ANAR_100BT4)
if (advert & PHY_ANAR_100BT4 && ability & PHY_ANAR_100BT4) {
anar &= ~(PHY_ANAR_100BT4|PHY_ANAR_100BTXFULL|PHY_ANAR_10BTFULL);