staging: vc04_services: Add a note to the TODO

Record in the TODO file that the address of "&waiter->bulk_waiter"
should never be returned to userspace.

Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Link: https://lore.kernel.org/r/20210105162030.1415213-4-phil@raspberrypi.com


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