dt-bindings: qcom,pdc: convert to YAML

Convert the PDC interrupt controller bindings to YAML.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220103074348.6039-1-luca.weiss@fairphone.com


Signed-off-by: Rob Herring <robh@kernel.org>