ehci-hcd.c: make local functions static

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 5e44ba1..936d006 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1314,7 +1314,7 @@
 }
 
 /* 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;