dt-bindings: interrupt-controller: qcom,pdc: Document SM8750 PDC

Document the PDC block on the SM8750 SoC.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
Link: https://lore.kernel.org/r/20241204-sm8750_master_pdc-v1-1-3a06cb62a28f@quicinc.com


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