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

drivers/staging/vc04_services/interface/TODO

@@ -91,3 +91,7 @@ The first thing one generally sees in a probe function is a memory allocation
 for all the device specific data. This structure is then passed all over the
 driver. This is good practice since it makes the driver work regardless of the
 number of devices probed.
+
+14) Clean up Sparse warnings from __user annotations. See
+vchiq_irq_queue_bulk_tx_rx(). Ensure that the address of "&waiter->bulk_waiter"
+is never disclosed to userspace.