ARM: dts: Update the "status" property of RTC DT node for Exynos5250 SoC

Moves the RTC DT node's "status" property from exynos5250 board
(arndale & snow) dts files to exynos5250.dtsi, since the bindings
in exynos5250.dtsi depicts the RTC h/w completely.
Signed-off-by: Vikas Sajjan <vikas.sajjan@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5250-arndale.dts

@@ -538,10 +538,6 @@ timing0: timing@0 {
 		};
 	};
 
-	rtc@101E0000 {
-		status = "okay";
-	};
-
 	usb_hub_bus {
 		compatible = "simple-bus";
 		#address-cells = <1>;

arch/arm/boot/dts/exynos5250-snow.dts

@@ -171,10 +171,6 @@ keyboard-controller {
 		};
 	};
 
-	rtc@101E0000 {
-		status = "okay";
-	};
-
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.

arch/arm/boot/dts/exynos5250.dtsi

@@ -183,6 +183,7 @@ codec@11000000 {
 	rtc@101E0000 {
 		clocks = <&clock 337>;
 		clock-names = "rtc";
+		status = "okay";
 	};
 
 	tmu@10060000 {