usb: core: devio.c: Fix assignment of 0/1 to bool variables

Use true/false for is_in bool type in function proc_do_submiturb.

Signed-off-by: Saurav Girepunje <saurav.girepunje@gmail.com>
Link: https://lore.kernel.org/r/20191007182649.GA7068@saurav


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