i40e: add missing link advertise setting

Adding the missing link advertise for some X710 NICs.
This can be observed by simply calling ethtool on the interface.
root@rhel7:~ # ethtool eth0
Settings for eth0:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
[...]
With fix applied.
root@rhel7:~ # ethtool eth0
Settings for eth0:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Advertised link modes:  10000baseT/Full
[...]
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

@@ -461,6 +461,7 @@ static void i40e_get_settings_link_up(struct i40e_hw *hw,
 	case I40E_PHY_TYPE_10GBASE_SFPP_CU:
 	case I40E_PHY_TYPE_10GBASE_AOC:
 		ecmd->supported = SUPPORTED_10000baseT_Full;
+		ecmd->advertising = SUPPORTED_10000baseT_Full;
 		break;
 	case I40E_PHY_TYPE_SGMII:
 		ecmd->supported = SUPPORTED_Autoneg |