ARM: dts: imx53: add srtc node

The i.MX53 has an integrated secure real time clock. Add it to the dtsi.
Signed-off-by: NPatrick Bruenn <p.bruenn@beckhoff.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53.dtsi

@@ -433,6 +433,15 @@
 				clock-names = "ipg", "per";
 			};
 
+			srtc: srtc@53fa4000 {
+				compatible = "fsl,imx53-rtc", "fsl,imx25-rtc";
+				reg = <0x53fa4000 0x4000>;
+				interrupts = <24>;
+				interrupt-parent = <&tzic>;
+				clocks = <&clks IMX5_CLK_SRTC_GATE>;
+				clock-names = "ipg";
+			};
+
 			iomuxc: iomuxc@53fa8000 {
 				compatible = "fsl,imx53-iomuxc";
 				reg = <0x53fa8000 0x4000>;