arm64: zynqmp: Enable iio-hwmon for ina226 on zcu100

ina226 hwmon driver is deprecated and it is recommended to use new iio
based driver. The patch is enabling iio-hwmon driver to export
functionality from IIO to hwmon interface to be able to use lm-sensors
package.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts

@@ -103,6 +103,11 @@ sdio_pwrseq: sdio-pwrseq {
 		reset-gpios = <&gpio 7 GPIO_ACTIVE_LOW>; /* WIFI_EN */
 		post-power-on-delay-ms = <10>;
 	};
+
+	ina226 {
+		compatible = "iio-hwmon";
+		io-channels = <&u35 0>, <&u35 1>, <&u35 2>, <&u35 3>;
+	};
 };
 
 &dcc {
@@ -191,8 +196,9 @@ i2csw_5: i2c@5 {
 			#size-cells = <0>;
 			reg = <5>;
 			/* PS_PMBUS */
-			ina226@40 { /* u35 */
+			u35: ina226@40 { /* u35 */
 				compatible = "ti,ina226";
+				#io-channel-cells = <1>;
 				reg = <0x40>;
 				shunt-resistor = <10000>;
 				/* MIO31 is alert which should be routed to PMUFW */