variants: arduino_nano_33_iot: describe unit address in hex

Fix unit-address and reg value to be described in hex

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>

Author: soburi

variants/arduino_nano_33_iot/arduino_nano_33_iot.overlay

@@ -119,35 +119,35 @@
 		zephyr,input-positive = <3>;
 	};
 
-	channel@10 {
-		reg = <10>;
+	channel@a {
+		reg = <0xa>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,resolution = <10>;
 		zephyr,input-positive = <10>;
 	};
 
-	channel@11 {
-		reg = <11>;
+	channel@b {
+		reg = <0xb>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,resolution = <10>;
 		zephyr,input-positive = <11>;
 	};
 
-	channel@18 {
-		reg = <18>;
+	channel@12 {
+		reg = <0x12>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,resolution = <10>;
 		zephyr,input-positive = <18>;
 	};
 
-	channel@19 {
-		reg = <19>;
+	channel@13 {
+		reg = <0x13>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;