Portenta C33 ADC: aligning channel numbering with reg propriety

Author: maidnl

variants/arduino_portenta_c33_r7fa6m5bh3cfc/arduino_portenta_c33_r7fa6m5bh3cfc.overlay

@@ -135,15 +135,15 @@
 		zephyr,resolution = <12>;
 	};
 
-	a6: channel@e {
+	a6: channel@c {
 		reg = <12>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,resolution = <12>;
 	};
 
-	a5: channel@f {
+	a5: channel@d {
 		reg = <13>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";