ARM: dts: s3c2416: Fix xti node's missing reg property warning

Fix the DTC warning for xti node:

    arch/arm/boot/dts/s3c2416-smdk2416.dts:23.12-28.5:
        Warning (simple_bus_reg): /clocks/xti: missing or empty reg/ranges property
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/s3c2416-smdk2416.dts

@@ -19,9 +19,12 @@ memory@30000000 {
 
 	clocks {
 		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
 
-		xti: xti {
+		xti: xti@0 {
 			compatible = "fixed-clock";
+			reg = <0>;
 			clock-frequency = <12000000>;
 			clock-output-names = "xti";
 			#clock-cells = <0>;