ARM: dts: uniphier: sync DT with Linux 4.19-rc1

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/uniphier-pxs2.dtsi b/arch/arm/dts/uniphier-pxs2.dtsi
index f4101c0..48782a5 100644
--- a/arch/arm/dts/uniphier-pxs2.dtsi
+++ b/arch/arm/dts/uniphier-pxs2.dtsi
@@ -36,6 +36,7 @@
 			enable-method = "psci";
 			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu_opp>;
+			#cooling-cells = <2>;
 		};
 
 		cpu2: cpu@2 {
@@ -46,6 +47,7 @@
 			enable-method = "psci";
 			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu_opp>;
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu@3 {
@@ -56,6 +58,7 @@
 			enable-method = "psci";
 			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu_opp>;
+			#cooling-cells = <2>;
 		};
 	};