ARM: shmobile: sh7372: Update DTS to include CPU frequency

Add CPU Frequency information to the sh7372 DTS file. This
will allow us to use the shared C code on sh7372 and Mackerel
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/sh7372.dtsi

@@ -21,6 +21,7 @@ cpu@0 {
 			compatible = "arm,cortex-a8";
 			device_type = "cpu";
 			reg = <0x0>;
+			clock-frequency = <800000000>;
 		};
 	};