i40e: fix error return

If the VF asks to add an invalid MAC address, tell it that instead of
just using a generic return code.

Change-Id: I366aff5449fa5874ad51e2734cac2a71783ab14b
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

@@ -1340,7 +1340,7 @@ static int i40e_vc_add_mac_addr_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 		    is_zero_ether_addr(al->list[i].addr)) {
 			dev_err(&pf->pdev->dev, "invalid VF MAC addr %pMAC\n",
 				al->list[i].addr);
-			aq_ret = I40E_ERR_PARAM;
+			aq_ret = I40E_ERR_INVALID_MAC_ADDR;
 			goto error_param;
 		}
 	}