igb_read_phy_reg_mdic
ret_val = igb_read_phy_reg_mdic(hw, offset, data);
ret_val = igb_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
s32 igb_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data);