[PATCH] USB: export usb_get_intf() and usb_put_intf()

Export usb_get_intf and usb_put_intf so that modules can increase
usb interface reference counts.

Signed-off-by: [e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/core/usb.c

···
 EXPORT_SYMBOL(usb_deregister);
 EXPORT_SYMBOL(usb_disabled);
 
+EXPORT_SYMBOL_GPL(usb_get_intf);
+EXPORT_SYMBOL_GPL(usb_put_intf);
+
 EXPORT_SYMBOL(usb_alloc_dev);
 EXPORT_SYMBOL(usb_put_dev);
 EXPORT_SYMBOL(usb_get_dev);