ARM: dts: r8a7794: Add missing clock for secondary CA7 CPU core

Currently only the primary CPU in the CA7 cluster has a clocks property,
while the secondary CPU core is driven by the same clock.
Add the missing clocks property to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7794.dtsi

@@ -53,6 +53,7 @@ cpu1: cpu@1 {
 			compatible = "arm,cortex-a7";
 			reg = <1>;
 			clock-frequency = <1000000000>;
+			clocks = <&cpg CPG_CORE R8A7794_CLK_Z2>;
 			power-domains = <&sysc R8A7794_PD_CA7_CPU1>;
 			next-level-cache = <&L2_CA7>;
 		};