BMCR_SPEED100
mii_ctl |= (sdc->speed == 100) ? BMCR_SPEED100 : 0;
speed = (mii_ctl & BMCR_SPEED100) ? 100 : 10;
ctl &= ~(BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
ctl |= BMCR_SPEED100;