Some binding that were introduced early on got a comment to enable
additionalProperties, but we couldn't due to the generic properties being
reported as errors.
The way we're dealing with this now is to use the draft-08's
unevaluatedProperties (even though the tools doesn't do anything with it
yet).
Let's convert those old bindings to it.
Signed-off-by: Maxime Ripard <maxime@cerno.tech> Signed-off-by: Rob Herring <robh@kernel.org>