i40e: remove client instance on driver unload

When the driver is unloaded, we need to remove the client instance,
otherwise we leak memory.

Change-ID: If1e7882ac1f6ce15d004722fafbe31afbe0adc9a
Signed-off-by: NMitch Williams <mitch.a.williams@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_client.c

@@ -459,6 +459,9 @@ int i40e_lan_del_device(struct i40e_pf *pf)
 	struct i40e_device *ldev, *tmp;
 	int ret = -ENODEV;
 
+	/* First, remove any client instance. */
+	i40e_client_del_instance(pf);
+
 	mutex_lock(&i40e_device_mutex);
 	list_for_each_entry_safe(ldev, tmp, &i40e_devices, list) {
 		if (ldev->pf == pf) {