ARM: i.MX51: Add GPT devicetree node

The GPT is the GPT timer found on i.MX SoCs. This patch adds the
devicetree node for it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx51.dtsi

@@ -245,6 +245,14 @@ wdog2: wdog@73f9c000 {
 				status = "disabled";
 			};
 
+			gpt: timer@73fa0000 {
+				compatible = "fsl,imx51-gpt", "fsl,imx31-gpt";
+				reg = <0x73fa0000 0x4000>;
+				interrupts = <39>;
+				clocks = <&clks 36>, <&clks 41>;
+				clock-names = "ipg", "per";
+			};
+
 			iomuxc: iomuxc@73fa8000 {
 				compatible = "fsl,imx51-iomuxc";
 				reg = <0x73fa8000 0x4000>;