ARM: shmobile: sh73a0: Update DTS to include CPU frequency

Add CPU Frequency information to the sh73a0 DTS file. This
will allow us to use the shared C code on sh73a0 and KZM9G
which reads out the clock frequency from DT and calculates the
delay settings from there.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0.dtsi

@@ -23,11 +23,13 @@ cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			reg = <0>;
+			clock-frequency = <1196000000>;
 		};
 		cpu@1 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			reg = <1>;
+			clock-frequency = <1196000000>;
 		};
 	};