amd-xgbe: Set the MDIO mode for 10000Base-T configuration

Currently the MDIO mode is set to none for the 10000Base-T, which is
incorrect.  The MDIO mode should for this configuration should be
clause 45.
Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c

@@ -2921,7 +2921,7 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 			phy_data->start_mode = XGBE_MODE_KR;
 		}
 
-		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
+		phy_data->phydev_mode = XGBE_MDIO_MODE_CL45;
 		break;
 
 	/* 10GBase-R support */