powerpc/t1023rdb: add ina220 current sensor node

Add support for INA220 current sensor.
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

arch/powerpc/boot/dts/t1023rdb.dts

@@ -99,6 +99,17 @@ rtc@68 {
 		};
 
 		i2c@118100 {
+			current-sensor@40 {
+				compatible = "ti,ina220";
+				reg = <0x40>;
+				shunt-resistor = <1000>;
+			};
+
+			current-sensor@41 {
+				compatible = "ti,ina220";
+				reg = <0x41>;
+				shunt-resistor = <1000>;
+			};
 		};
 	};