regulator: dt-bindings: Add missing (unevaluated|additional)Properties on child nodes

In order to ensure only documented properties are present, node schemas
must have unevaluatedProperties or additionalProperties set to false
(typically).

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220823145649.3118479-7-robh@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>