DM: fixed ADC channel

Author: deanm1278

variants/metro_m4/variant.cpp

@@ -121,7 +121,7 @@ const PinDescription g_APinDescription[]=
   // --------------------
   { PORTA,  2, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel0, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 },
   { PORTA,  5, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel5, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_5 },
-  { PORTA,  6, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel3, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_6 },
+  { PORTA,  6, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel6, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_6 },
   { PORTA,  7, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel7, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_7 },
   { PORTA,  11, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel11, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_11 },
   { PORTA,  4, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel4, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_4 },