e1000e: Fix return value test

All the helpers return -E1000_ERR_PHY.
Signed-off-by: NBenjamin Poirier <bpoirier@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -5099,7 +5099,7 @@ static bool e1000e_has_link(struct e1000_adapter *adapter)
 		break;
 	}
 
-	if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
+	if ((ret_val == -E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
 	    (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
 		/* See e1000_kmrn_lock_loss_workaround_ich8lan() */
 		e_info("Gigabit has been disabled, downgrading speed\n");