arm64: dts: rockchip: add missing cache properties

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

  rk3588s-khadas-edge2.dtb: l3-cache: 'cache-unified' is a dependency of 'cache-size'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230421223149.115185-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: krzk

arch/arm64/boot/dts/rockchip/rk3308.dtsi

@@ -97,6 +97,7 @@
 		l2: l2-cache {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/rockchip/rk3328.dtsi

@@ -103,6 +103,7 @@
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 

arch/arm64/boot/dts/rockchip/rk3588s.dtsi

@@ -229,6 +229,7 @@
 			cache-line-size = <64>;
 			cache-sets = <512>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -238,6 +239,7 @@
 			cache-line-size = <64>;
 			cache-sets = <512>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -247,6 +249,7 @@
 			cache-line-size = <64>;
 			cache-sets = <512>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -256,6 +259,7 @@
 			cache-line-size = <64>;
 			cache-sets = <512>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -265,6 +269,7 @@
 			cache-line-size = <64>;
 			cache-sets = <1024>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -274,6 +279,7 @@
 			cache-line-size = <64>;
 			cache-sets = <1024>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -283,6 +289,7 @@
 			cache-line-size = <64>;
 			cache-sets = <1024>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -292,6 +299,7 @@
 			cache-line-size = <64>;
 			cache-sets = <1024>;
 			cache-level = <2>;
+			cache-unified;
 			next-level-cache = <&l3_cache>;
 		};
 
@@ -301,6 +309,7 @@
 			cache-line-size = <64>;
 			cache-sets = <4096>;
 			cache-level = <3>;
+			cache-unified;
 		};
 	};