arm64: dts: r8a7795: Add missing properties to CA57 L2 cache node

Add the missing "cache-unified" and "cache-level" properties to the
Cortex-A57 cache-controller node.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a7795.dtsi

@@ -68,6 +68,8 @@ a57_3: cpu@3 {
 
 	L2_CA57: cache-controller@0 {
 		compatible = "cache";
+		cache-unified;
+		cache-level = <2>;
 	};
 
 	extal_clk: extal {