staging: vc04_services: vchiq: Drop custom return values from TODO

The custom return values (enum vchiq_status) has been dropped.
Remove the TODO entry for the same.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/20221223122404.170585-8-umang.jain@ideasonboard.com


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