ehci-hcd.c: make local functions static

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>

drivers/usb/host/ehci-hcd.c

@@ -1314,7 +1314,7 @@ void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
 }
 
 /* Do not free buffers associated with QHs, they're owned by someone else */
-int
+static int
 destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
 {
 	struct ehci_ctrl *ctrl = dev->controller;