i40e: remove second check of VLAN_N_VID in i40e_vlan_rx_add_vid

Replace a check of magic number 4095 with VLAN_N_VID. This
makes it obvious that a later check against VLAN_N_VID is
always true and can be removed.

Change-ID: I28998f127a61a529480ce63d8a07e266f6c63b7b
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -2549,7 +2549,7 @@ static int i40e_vlan_rx_add_vid(struct net_device *netdev,
 	struct i40e_vsi *vsi = np->vsi;
 	int ret = 0;
 
-	if (vid > 4095)
+	if (vid >= VLAN_N_VID)
 		return -EINVAL;
 
 	/* If the network stack called us with vid = 0 then
@@ -2561,7 +2561,7 @@ static int i40e_vlan_rx_add_vid(struct net_device *netdev,
 	if (vid)
 		ret = i40e_vsi_add_vlan(vsi, vid);
 
-	if (!ret && (vid < VLAN_N_VID))
+	if (!ret)
 		set_bit(vid, vsi->active_vlans);
 
 	return ret;