USB: core: clean up endpoint-descriptor parsing

Use the new usb-device pointer instead of back-casting when accessing
the struct usb_device when parsing endpoints.

Note that this introduces two lines that are longer than 80 chars on
purpose.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20200203153830.26394-4-johan@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>