arm64: dts: amlogic: add missing cache properties

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

  meson-a1-ad401.dtb: l2-cache0: 'cache-unified' is a required property

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20230421223211.115612-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

arch/arm64/boot/dts/amlogic/meson-a1.dtsi

@@ -37,6 +37,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

@@ -106,6 +106,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/amlogic/meson-g12a.dtsi

@@ -51,6 +51,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/amlogic/meson-g12b.dtsi

@@ -106,6 +106,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 };

arch/arm64/boot/dts/amlogic/meson-gx.dtsi

@@ -133,6 +133,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/amlogic/meson-sm1.dtsi

@@ -89,6 +89,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};