arm64: dts: apm: add missing cache properties

As all level 2 and level 3 caches are unified, add required
cache-unified and cache-level properties to fix warnings like:

  apm-mustang.dtb: l2-cache-0: 'cache-level' is a required property
  apm-mustang.dtb: l2-cache-0: 'cache-unified' is a required property

Link: https://lore.kernel.org/r/20230421223139.115044-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm64/boot/dts/apm/apm-shadowcat.dtsi

@@ -97,15 +97,23 @@ cpu@301 {
 		};
 		xgene_L2_0: l2-cache-0 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 		xgene_L2_1: l2-cache-1 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 		xgene_L2_2: l2-cache-2 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 		xgene_L2_3: l2-cache-3 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/apm/apm-storm.dtsi

@@ -81,15 +81,23 @@ cpu@301 {
 		};
 		xgene_L2_0: l2-cache-0 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 		xgene_L2_1: l2-cache-1 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 		xgene_L2_2: l2-cache-2 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 		xgene_L2_3: l2-cache-3 {
 			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
 		};
 	};