[PATCH] USB: small cleanups

This patch contains the following cleanups:
- make needlessly global functions static
- every file should #include the headers containing the prototypes for
  it's global functions

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index 2e6593e..9baa629 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -646,14 +646,14 @@
 	kfree(instance);
 }
 
-void usbatm_get_instance(struct usbatm_data *instance)
+static void usbatm_get_instance(struct usbatm_data *instance)
 {
 	dbg("%s", __func__);
 
 	kref_get(&instance->refcount);
 }
 
-void usbatm_put_instance(struct usbatm_data *instance)
+static void usbatm_put_instance(struct usbatm_data *instance)
 {
 	dbg("%s", __func__);