MII_RESV1
#define MII_NSC_CONG MII_RESV1
phy_reserved = mii_rw(dev, np->phyaddr, MII_RESV1, MII_READ);
if (mii_rw(dev, np->phyaddr, MII_RESV1, phy_reserved))
np->phy_rev = mii_rw(dev, phyaddr, MII_RESV1, MII_READ) & PHY_REV_MASK;
case MII_RESV1: /* reserved 1 */