IXGBE_WUFC
sc->wufc = IXGBE_READ_REG(hw, IXGBE_WUFC);
IXGBE_WRITE_REG(hw, IXGBE_WUFC, sc->wufc);
IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);