ARM: dts: exynos: Override thermal by label in Exynos5250

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/20200901075417.22481-8-krzk@kernel.org

arch/arm/boot/dts/exynos5250.dtsi

@@ -1085,8 +1085,22 @@ sysmmu_tv: sysmmu@14650000 {
 		};
 	};
 
-	thermal-zones {
-		cpu_thermal: cpu-thermal {
+	timer {
+		compatible = "arm,armv7-timer";
+		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+		/*
+		 * Unfortunately we need this since some versions
+		 * of U-Boot on Exynos don't set the CNTFRQ register,
+		 * so we need the value from DT.
+		 */
+		clock-frequency = <24000000>;
+	};
+};
+
+&cpu_thermal {
 	polling-delay-passive = <0>;
 	polling-delay = <0>;
 	thermal-sensors = <&tmu 0>;
@@ -1102,22 +1116,6 @@ map1 {
 					 <&cpu1 15 15>;
 		};
 	};
-		};
-	};
-
-	timer {
-		compatible = "arm,armv7-timer";
-		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
-			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
-			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
-			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
-		/*
-		 * Unfortunately we need this since some versions
-		 * of U-Boot on Exynos don't set the CNTFRQ register,
-		 * so we need the value from DT.
-		 */
-		clock-frequency = <24000000>;
-	};
 };
 
 &dp {