arm64: dts: qcom: pm8916: add interrupt controller properties

Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt
controller properties ('interrupt-controller' and '#interrupt-cells').
The interrupts property is no longer needed so remove it.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211008012524.481877-25-dmitry.baryshkov@linaro.org

arch/arm64/boot/dts/qcom/pm8916.dtsi

@@ -103,10 +103,8 @@ pm8916_mpps: mpps@a000 {
 			gpio-controller;
 			#gpio-cells = <2>;
 			gpio-ranges = <&pm8916_mpps 0 0 4>;
-			interrupts = <0 0xa0 0 IRQ_TYPE_NONE>,
-				     <0 0xa1 0 IRQ_TYPE_NONE>,
-				     <0 0xa2 0 IRQ_TYPE_NONE>,
-				     <0 0xa3 0 IRQ_TYPE_NONE>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
 		};
 
 		pm8916_gpios: gpios@c000 {