ARM: dts: Add PMU DT node for exynos5260 SoC

Adds PMU DT node for exynos5260 SoC.

Signed-off-by: Vikas Sajjan <[e-mail]>
Signed-off-by: Kukjin Kim <[e-mail]>

Documentation/devicetree/bindings/arm/samsung/pmu.txt

···
 		   - "samsung,exynos4212-pmu" - for Exynos4212 SoC,
 		   - "samsung,exynos4412-pmu" - for Exynos4412 SoC,
 		   - "samsung,exynos5250-pmu" - for Exynos5250 SoC,
+		   - "samsung,exynos5260-pmu" - for Exynos5260 SoC.
 		   - "samsung,exynos5410-pmu" - for Exynos5410 SoC,
 		   - "samsung,exynos5420-pmu" - for Exynos5420 SoC.
 		second value must be always "syscon".

arch/arm/boot/dts/exynos5260.dtsi

···
 			interrupts = <0 243 0>;
 		};
 
+		pmu_system_controller: system-controller@10D50000 {
+			compatible = "samsung,exynos5260-pmu", "syscon";
+			reg = <0x10D50000 0x10000>;
+		};
+
 		uart0: serial@12C00000 {
 			compatible = "samsung,exynos4210-uart";
 			reg = <0x12C00000 0x100>;