Odroid-C4: Correct ADC nodes and change their access number as to the Odroid convention

Signed-off-by: Deokgyu Yang <secugyu@gmail.com>
Change-Id: I60db52cdf1ff4137b75b7336796a0fbd93eb7998
diff --git a/wiringPi/odroidc4.c b/wiringPi/odroidc4.c
index 77041cf..750c083 100644
--- a/wiringPi/odroidc4.c
+++ b/wiringPi/odroidc4.c
@@ -522,12 +522,22 @@
 
 	/* wiringPi ADC number = pin 25, pin 29 */
 	switch (pin) {
-	case	3:	case	25:
+#if defined(ARDUINO)
+	/* To work with physical analog channel numbering */
+	case	2:	case	25:
 		pin = 0;
 	break;
-	case	2:	case	29:
+	case	0:	case	29:
 		pin = 1;
 	break;
+#else
+	case	0:	case	25:
+		pin = 0;
+	break;
+	case	1:	case	29:
+		pin = 1;
+	break;
+#endif
 	default:
 		return	0;
 	}