ARM: dts: qcom-pm8941: 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 <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-pm8941.dtsi

···
 			gpio-controller;
 			#gpio-cells = <2>;
 			gpio-ranges = <&pm8941_mpps 0 0 8>;
-			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>,
-				     <0 0xa4 0 IRQ_TYPE_NONE>,
-				     <0 0xa5 0 IRQ_TYPE_NONE>,
-				     <0 0xa6 0 IRQ_TYPE_NONE>,
-				     <0 0xa7 0 IRQ_TYPE_NONE>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
 		};
 
 		pm8941_temp: temp-alarm@2400 {