dt-bindings: pinctrl: qcom,pmic-mpp: switch to #interrupt-cells

Stop specifying individual interrupts properties. Use #interrupt-cells
instead as we are switching qcom,spmi-mpp and qcom,ssbi-mpp to
hierarchical IRQ setup.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211008012524.481877-18-dmitry.baryshkov@linaro.org


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>