ARM: dts: renesas: rcar-gen2: Add missing #interrupt-cells to DA9063 nodes

make dtbs_check W=2:

    arch/arm/boot/dts/renesas/r8a7790-lager.dts:444.11-458.5: Warning (interrupt_provider): /i2c-mux4/pmic@58: Missing '#interrupt-cells' in interrupt provider
    ...

Fix this by adding the missing #interrupt-cells properties.
Reported-by: Rob Herring <robh@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/a351e503ea97fb1af68395843f513925ff1bdf26.1707922460.git.geert+renesas@glider.be

arch/arm/boot/dts/renesas/r8a7790-lager.dts

@@ -447,6 +447,7 @@ pmic@58 {
 			interrupt-parent = <&irqc0>;
 			interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 			interrupt-controller;
+			#interrupt-cells = <2>;
 
 			rtc {
 				compatible = "dlg,da9063-rtc";

arch/arm/boot/dts/renesas/r8a7790-stout.dts

@@ -347,6 +347,7 @@ pmic@58 {
 		interrupt-parent = <&irqc0>;
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		onkey {
 			compatible = "dlg,da9063-onkey";

arch/arm/boot/dts/renesas/r8a7791-koelsch.dts

@@ -819,6 +819,7 @@ pmic@58 {
 		interrupt-parent = <&irqc0>;
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		rtc {
 			compatible = "dlg,da9063-rtc";

arch/arm/boot/dts/renesas/r8a7791-porter.dts

@@ -413,6 +413,7 @@ pmic@5a {
 		interrupt-parent = <&irqc0>;
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		watchdog {
 			compatible = "dlg,da9063-watchdog";

arch/arm/boot/dts/renesas/r8a7792-blanche.dts

@@ -381,6 +381,7 @@ pmic@58 {
 		interrupt-parent = <&irqc>;
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		rtc {
 			compatible = "dlg,da9063-rtc";

arch/arm/boot/dts/renesas/r8a7793-gose.dts

@@ -759,6 +759,7 @@ pmic@58 {
 		interrupt-parent = <&irqc0>;
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		rtc {
 			compatible = "dlg,da9063-rtc";

arch/arm/boot/dts/renesas/r8a7794-alt.dts

@@ -453,6 +453,7 @@ pmic@58 {
 		interrupt-parent = <&gpio3>;
 		interrupts = <31 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		rtc {
 			compatible = "dlg,da9063-rtc";

arch/arm/boot/dts/renesas/r8a7794-silk.dts

@@ -439,6 +439,7 @@ pmic@58 {
 		interrupt-parent = <&gpio3>;
 		interrupts = <31 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-controller;
+		#interrupt-cells = <2>;
 
 		onkey {
 			compatible = "dlg,da9063-onkey";