usb: hub: rename usb_kick_khubd() to usb_kick_hub_wq()

USB hub started to use a workqueue instead of kthread. Let's make it clear from
the function names.

Signed-off-by: Petr Mladek <pmladek@suse.cz>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index ed7db51..9b01ab2 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -598,7 +598,7 @@
 	kref_put(&hub->kref, hub_release);
 }
 
-void usb_kick_khubd(struct usb_device *hdev)
+void usb_kick_hub_wq(struct usb_device *hdev)
 {
 	struct usb_hub *hub = usb_hub_to_struct_hub(hdev);