PHY_CTRL
if((ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data)))
if((ret_val = e1000_write_phy_reg(hw, PHY_CTRL, phy_data)))
if((ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data)))
if((ret_val = e1000_write_phy_reg(hw, PHY_CTRL, phy_data)))