usb: core: bail out if user gives an unknown RefId when using new_id

If users use the new RefId feature of new_id, give them an error message
if they provided an unknown reference. That helps detecting typos.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>