rp: add missing Debug and defmt::Format derives for ADC

this doesn't cover every `struct` & co. in `embassy-rp`, but at least it
adds those needed for `Adc` and `adc::Channel`.

embassy-rp/src/adc.rs

@@ -21,6 +21,8 @@ static WAKER: AtomicWaker = AtomicWaker::new();
 #[derive(Default)]
 pub struct Config {}
 
+#[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 enum Source<'p> {
     Pin(Peri<'p, AnyPin>),
     TempSensor(Peri<'p, ADC_TEMP_SENSOR>),

embassy-rp/src/gpio.rs

@@ -932,6 +932,8 @@ pub trait Pin: PeripheralType + Into<AnyPin> + SealedPin + Sized + 'static {
 }
 
 /// Type-erased GPIO pin
+#[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct AnyPin {
     pin_bank: u8,
 }