ASoC: dt-bindings: qcom,q6apm-dai: adjust indentation in example

Cleanup the example DTS by fixing indentation to 4-spaces and adding
blank lines for readability.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220910091428.50418-15-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>