ARM: dts: bcmbca: bcm6878: cosmetic change

Add new line between dts node.
Signed-off-by: William Zhang <william.zhang@broadcom.com>
Link: https://lore.kernel.org/r/20220801194754.29492-2-william.zhang@broadcom.comSigned-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm6878.dtsi

@@ -32,6 +32,7 @@ CA7_1: cpu@1 {
 			next-level-cache = <&L2_0>;
 			enable-method = "psci";
 		};
+
 		L2_0: l2-cache0 {
 			compatible = "cache";
 		};