arm64: dts: uniphier: Add L2 cache node

Add a L2 cache node referenced from CPU nodes as the missing cache hierarchy
information because the following warning was issued.

  cacheinfo: Unable to detect cache hierarchy for CPU 0
  Early cacheinfo failed, ret = -2
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/20220913042321.4817-11-hayashi.kunihiko@socionext.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi

@@ -36,6 +36,7 @@ cpu0: cpu@0 {
 			reg = <0 0x000>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cluster0_opp>;
 		};
 
@@ -45,8 +46,13 @@ cpu1: cpu@1 {
 			reg = <0 0x001>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cluster0_opp>;
 		};
+
+		l2: l2-cache {
+			compatible = "cache";
+		};
 	};
 
 	cluster0_opp: opp-table {

arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi

@@ -46,6 +46,7 @@ cpu0: cpu@0 {
 			reg = <0 0x000>;
 			clocks = <&sys_clk 32>;
 			enable-method = "psci";
+			next-level-cache = <&a72_l2>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 		};
@@ -56,6 +57,7 @@ cpu1: cpu@1 {
 			reg = <0 0x001>;
 			clocks = <&sys_clk 32>;
 			enable-method = "psci";
+			next-level-cache = <&a72_l2>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 		};
@@ -66,6 +68,7 @@ cpu2: cpu@100 {
 			reg = <0 0x100>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&a53_l2>;
 			operating-points-v2 = <&cluster1_opp>;
 			#cooling-cells = <2>;
 		};
@@ -76,9 +79,18 @@ cpu3: cpu@101 {
 			reg = <0 0x101>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&a53_l2>;
 			operating-points-v2 = <&cluster1_opp>;
 			#cooling-cells = <2>;
 		};
+
+		a72_l2: l2-cache0 {
+			compatible = "cache";
+		};
+
+		a53_l2: l2-cache1 {
+			compatible = "cache";
+		};
 	};
 
 	cluster0_opp: opp-table-0 {

arch/arm64/boot/dts/socionext/uniphier-pxs3.dtsi

@@ -43,6 +43,7 @@ cpu0: cpu@0 {
 			reg = <0 0x000>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 		};
@@ -53,6 +54,7 @@ cpu1: cpu@1 {
 			reg = <0 0x001>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 		};
@@ -63,6 +65,7 @@ cpu2: cpu@2 {
 			reg = <0 0x002>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 		};
@@ -73,9 +76,14 @@ cpu3: cpu@3 {
 			reg = <0 0x003>;
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 		};
+
+		l2: l2-cache {
+			compatible = "cache";
+		};
 	};
 
 	cluster0_opp: opp-table {