ARM: dts: sh73a0: Add clocks for CA9 CPU cores

Improve hardware description by adding clocks properties to the device
nodes corresponding to the CA9 CPU cores.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0.dtsi

@@ -27,6 +27,7 @@ cpu@0 {
 			compatible = "arm,cortex-a9";
 			reg = <0>;
 			clock-frequency = <1196000000>;
+			clocks = <&cpg_clocks SH73A0_CLK_Z>;
 			power-domains = <&pd_a2sl>;
 			next-level-cache = <&L2>;
 		};
@@ -35,6 +36,7 @@ cpu@1 {
 			compatible = "arm,cortex-a9";
 			reg = <1>;
 			clock-frequency = <1196000000>;
+			clocks = <&cpg_clocks SH73A0_CLK_Z>;
 			power-domains = <&pd_a2sl>;
 			next-level-cache = <&L2>;
 		};