dt-bindings: qcom,pdc: document the SM8650 Power Domain Controller

Document the Power Domain Controller on the SM8650 Platform.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231025-topic-sm8650-upstream-bindings-pdc-v1-1-42f62cc9858c@linaro.org


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