ASoC: dt-bindings: samsung,smdk5250: convert to dtschema

Convert the audio complex on SMDK5250 boards with Samsung Exynos SoC 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/20220129122430.45694-3-krzysztof.kozlowski@canonical.com


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