ARM: dts: Add syscon-{reboot, poweroff} nodes for exynos5410

This patch adds syscon-{reboot, poweroff} nodes to allow the
generic syscon-{reboot, poweroff} driver to reset/poweroff exynos5410 SoC.
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/boot/dts/exynos5410.dtsi

@@ -102,6 +102,20 @@ pmu_system_controller: system-controller@10040000 {
 			reg = <0x10040000 0x5000>;
 		};
 
+		poweroff: syscon-poweroff {
+			compatible = "syscon-poweroff";
+			regmap = <&pmu_system_controller>;
+			offset = <0x330C>; /* PS_HOLD_CONTROL */
+			mask = <0x5200>; /* reset value */
+		};
+
+		reboot: syscon-reboot {
+			compatible = "syscon-reboot";
+			regmap = <&pmu_system_controller>;
+			offset = <0x0400>; /* SWRESET */
+			mask = <0x1>;
+		};
+
 		mct: mct@101C0000 {
 			compatible = "samsung,exynos4210-mct";
 			reg = <0x101C0000 0xB00>;