ARM: dts: exynos: Fix DTC unit name warnings in Exynos5440

Fix following DTC warnings in Exynos5440 boards:

Warning (unit_address_vs_reg): Node /pinctrl has a reg or ranges property, but no unit name
Warning (unit_address_vs_reg): Node /rtc has a reg or ranges property, but no unit name
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

arch/arm/boot/dts/exynos5440.dtsi

@@ -132,7 +132,7 @@ spi_0: spi@D0000 {
 		clock-names = "spi", "spi_busclk0";
 	};
 
-	pin_ctrl: pinctrl {
+	pin_ctrl: pinctrl@E0000 {
 		compatible = "samsung,exynos5440-pinctrl";
 		reg = <0xE0000 0x1000>;
 		interrupts = <0 37 0>, <0 38 0>, <0 39 0>, <0 40 0>,
@@ -205,7 +205,7 @@ amba {
 		ranges;
 	};
 
-	rtc {
+	rtc@130000 {
 		compatible = "samsung,s3c6410-rtc";
 		reg = <0x130000 0x1000>;
 		interrupts = <0 17 0>, <0 16 0>;