i40e: register existing client on probe

In some cases, a client (i40iw) may already be present when probe is
called. Check for this, and add a client instance if necessary.

Change-ID: I2009312694b7ad81f1023919e4c6c86181f21689
Signed-off-by: Mitch Williams <mitch.a.williams@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_client.c

@@ -436,6 +436,12 @@ int i40e_lan_add_device(struct i40e_pf *pf)
 		 pf->hw.pf_id, pf->hw.bus.bus_id,
 		 pf->hw.bus.device, pf->hw.bus.func);
 
+	/* If a client has already been registered, we need to add an instance
+	 * of it to our new LAN device.
+	 */
+	if (registered_client)
+		i40e_client_add_instance(pf);
+
 	/* Since in some cases register may have happened before a device gets
 	 * added, we can schedule a subtask to go initiate the clients if
 	 * they can be launched at probe time.