ASoC: dt-bindings: qcom,apq8096-sndcard: use dtschema

Remove old txt bindings and add apq8096 soundcard entry to existing
dt schema.

Signed-off-by: Rayyan Ansari <rayyan.ansari@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240710113833.39859-4-rayyan.ansari@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>