dt-bindings: interrupt-controller: qcom-pdc: add compatible for sa8775p

Add a compatible for the Power Domain Controller on SA8775p platforms.
Increase the number of PDC pin mappings.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230417094635.302344-1-brgl@bgdev.pl


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