ARM: dts: exynos: Override thermal by label in Trats

Using full paths to extend or override a device tree node is error prone
since if there was a typo error, a new node will be created instead of
extending the node as it was desired.  This will lead to run-time errors
that could be hard to detect.

A mistyped label on the other hand, will cause a dtc compile error
(during build time).
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200830135200.24304-18-krzk@kernel.org

arch/arm/boot/dts/exynos4210-trats.dts

@@ -140,22 +140,6 @@ pmic_ap_clk: pmic-ap-clk {
 			clock-frequency = <32768>;
 		};
 	};
-
-	thermal-zones {
-		cpu_thermal: cpu-thermal {
-			cooling-maps {
-				map0 {
-				     /* Corresponds to 800MHz at freq_table */
-				     cooling-device = <&cpu0 2 2>, <&cpu1 2 2>;
-				};
-				map1 {
-				     /* Corresponds to 200MHz at freq_table */
-				     cooling-device = <&cpu0 4 4>, <&cpu1 4 4>;
-			       };
-		       };
-		};
-	};
-
 };
 
 &camera {
@@ -168,6 +152,19 @@ &cpu0 {
 	cpu0-supply = <&varm_breg>;
 };
 
+&cpu_thermal {
+	cooling-maps {
+		map0 {
+			/* Corresponds to 800MHz at freq_table */
+			cooling-device = <&cpu0 2 2>, <&cpu1 2 2>;
+		};
+		map1 {
+			/* Corresponds to 200MHz at freq_table */
+			cooling-device = <&cpu0 4 4>, <&cpu1 4 4>;
+		};
+	};
+};
+
 &dsi_0 {
 	vddcore-supply = <&vusb_reg>;
 	vddio-supply = <&vmipi_reg>;