ARM: dts: i.MX3x: add keypad port devicetree nodes

Add the Keypad Port (KPP) devicetree nodes for IMX31 and IMX35 SOC.
Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx31.dtsi

@@ -69,6 +69,14 @@ uart2: serial@43f94000 {
 				status = "disabled";
 			};
 
+			kpp: kpp@43fa8000 {
+				compatible = "fsl,imx31-kpp", "fsl,imx21-kpp";
+				reg = <0x43fa8000 0x4000>;
+				interrupts = <24>;
+				clocks = <&clks 46>;
+				status = "disabled";
+			};
+
 			uart4: serial@43fb0000 {
 				compatible = "fsl,imx31-uart", "fsl,imx21-uart";
 				reg = <0x43fb0000 0x4000>;

arch/arm/boot/dts/imx35.dtsi

@@ -137,6 +137,14 @@ spi1: cspi@43fa4000 {
 				status = "disabled";
 			};
 
+			kpp: kpp@43fa8000 {
+				compatible = "fsl,imx35-kpp", "fsl,imx21-kpp";
+				reg = <0x43fa8000 0x4000>;
+				interrupts = <24>;
+				clocks = <&clks 56>;
+				status = "disabled";
+			};
+
 			iomuxc: iomuxc@43fac000 {
 				compatible = "fsl,imx35-iomuxc";
 				reg = <0x43fac000 0x4000>;