staging: fieldbus: add TODO

Add a TODO file which describes what needs to be done in order to
get the fieldbus_dev subsystem out of staging.
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fieldbus/TODO

+TODO:
+-Get more people/drivers to use the Fieldbus userspace ABI. It requires
+ verification/sign-off by multiple users.
+
+Contact: Sven Van Asbroeck <TheSven73@gmail.com>