ARM: dts: qcom-mdm9615: 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/20211008012524.481877-20-dmitry.baryshkov@linaro.org

arch/arm/boot/dts/qcom-mdm9615.dtsi

@@ -302,13 +302,8 @@ pwrkey@1c {
 
 				pmicmpp: mpps@50 {
 					compatible = "qcom,pm8018-mpp", "qcom,ssbi-mpp";
-					interrupt-parent = <&pmicintc>;
-					interrupts = <24 IRQ_TYPE_NONE>,
-						     <25 IRQ_TYPE_NONE>,
-						     <26 IRQ_TYPE_NONE>,
-						     <27 IRQ_TYPE_NONE>,
-						     <28 IRQ_TYPE_NONE>,
-						     <29 IRQ_TYPE_NONE>;
+					interrupt-controller;
+					#interrupt-cells = <2>;
 					reg = <0x50>;
 					gpio-controller;
 					#gpio-cells = <2>;