ARM: dts: Re-organize RTC status for exynos5250

Some boards might not have RTC xtal, so RTC shouldn't really be
enabled by default. Enable it in the required board files. For
now enable it for all board files to maintain the enabled status
exisitng prior to this patch.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

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

@@ -25,6 +25,10 @@
 		bootargs = "console=ttySAC2,115200";
 	};
 
+	rtc@101E0000 {
+		status = "okay";
+	};
+
 	codec@11000000 {
 		samsung,mfc-r = <0x43000000 0x800000>;
 		samsung,mfc-l = <0x51000000 0x800000>;

arch/arm/boot/dts/exynos5250-smdk5250.dts

@@ -27,6 +27,10 @@
 		bootargs = "root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M console=ttySAC2,115200 init=/linuxrc";
 	};
 
+	rtc@101E0000 {
+		status = "okay";
+	};
+
 	i2c@12C60000 {
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-max-bus-freq = <20000>;

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

@@ -20,6 +20,10 @@
 		i2c104 = &i2c_104;
 	};
 
+	rtc@101E0000 {
+		status = "okay";
+	};
+
 	pinctrl@11400000 {
 		sd3_clk: sd3-clk {
 			samsung,pin-drv = <0>;

arch/arm/boot/dts/exynos5250.dtsi

@@ -201,7 +201,7 @@
 	rtc@101E0000 {
 		clocks = <&clock 337>;
 		clock-names = "rtc";
-		status = "okay";
+		status = "disabled";
 	};
 
 	tmu@10060000 {