ARM: dts: r8a7790: Add missing clocks for secondary CA15 CPU cores

Currently only the primary CPU in the CA15 cluster has a clocks
property, while the secondary CPU cores are driven by the same clock.
Add the missing clocks properties to fix this.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Tested-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7790.dtsi

@@ -72,6 +72,7 @@
 			compatible = "arm,cortex-a15";
 			reg = <1>;
 			clock-frequency = <1300000000>;
+			clocks = <&cpg CPG_CORE R8A7790_CLK_Z>;
 			power-domains = <&sysc R8A7790_PD_CA15_CPU1>;
 			next-level-cache = <&L2_CA15>;
 			capacity-dmips-mhz = <1024>;
@@ -82,6 +83,7 @@
 			compatible = "arm,cortex-a15";
 			reg = <2>;
 			clock-frequency = <1300000000>;
+			clocks = <&cpg CPG_CORE R8A7790_CLK_Z>;
 			power-domains = <&sysc R8A7790_PD_CA15_CPU2>;
 			next-level-cache = <&L2_CA15>;
 			capacity-dmips-mhz = <1024>;
@@ -92,6 +94,7 @@
 			compatible = "arm,cortex-a15";
 			reg = <3>;
 			clock-frequency = <1300000000>;
+			clocks = <&cpg CPG_CORE R8A7790_CLK_Z>;
 			power-domains = <&sysc R8A7790_PD_CA15_CPU3>;
 			next-level-cache = <&L2_CA15>;
 			capacity-dmips-mhz = <1024>;