ARM: dts: imx23-olinuxino: enable Low Resolution ADC

The i.MX23 has a internal Low Resolution ADC; this enables the support
for this device.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx23-olinuxino.dts

@@ -69,6 +69,10 @@
 		};
 
 		apbx@80040000 {
+			lradc@80050000 {
+				status = "okay";
+			};
+
 			duart: serial@80070000 {
 				pinctrl-names = "default";
 				pinctrl-0 = <&duart_pins_a>;