regulator: dt-bindings: maxim,max8952: convert to dtschema

Convert the Maxim MAX8952 regulator to DT schema format.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210930140327.196232-1-krzysztof.kozlowski@canonical.com


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