ASoC: dt-bindings: atmel-classd: Convert to json-schema

Convert atmel CLASSD devicetree binding to json-schema.
Change file name to match json-scheme naming.

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220715162922.660859-2-Ryan.Wanner@microchip.com


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