Remove the case for 82577 because it does not support the ability to check
for downshift.  Add case for e1000_phy_bm which can do this.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
        switch (phy->type) {
        case e1000_phy_m88:
        case e1000_phy_gg82563:
+       case e1000_phy_bm:
        case e1000_phy_82578:
-       case e1000_phy_82577:
                offset  = M88E1000_PHY_SPEC_STATUS;
                mask    = M88E1000_PSSR_DOWNSHIFT;
                break;