ARM: dts: Fill in CPU clock-frequency for exynos5410

It's 1.6 GHz for the Cortex-A15.

Avoids warnings like "/cpus/cpu@0 missing clock-frequency property".
Signed-off-by: NAndreas Faerber <afaerber@suse.de>
Reviewed-by: NTarek Dakhran <t.dakhran@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5410.dtsi

@@ -28,24 +28,28 @@
 			device_type = "cpu";
 			compatible = "arm,cortex-a15";
 			reg = <0x0>;
+			clock-frequency = <1600000000>;
 		};
 
 		CPU1: cpu@1 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a15";
 			reg = <0x1>;
+			clock-frequency = <1600000000>;
 		};
 
 		CPU2: cpu@2 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a15";
 			reg = <0x2>;
+			clock-frequency = <1600000000>;
 		};
 
 		CPU3: cpu@3 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a15";
 			reg = <0x3>;
+			clock-frequency = <1600000000>;
 		};
 	};