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-hal-internal/src/macros.rs

@@ -8,6 +8,8 @@ macro_rules! peripherals_definition {
                 $(#[$cfg])?
                 #[allow(non_camel_case_types)]
                 #[doc = concat!(stringify!($name), " peripheral")]
+                #[derive(Debug)]
+                #[cfg_attr(feature = "defmt", derive(defmt::Format))]
                 pub struct $name { _private: () }
 
                 $(#[$cfg])?

embassy-hal-internal/src/peripheral.rs

@@ -14,6 +14,8 @@ use core::ops::Deref;
 ///   the driver code would be monomorphized two times. With Peri, the driver is generic
 ///   over a lifetime only. `SPI4` becomes `Peri<'static, SPI4>`, and `&mut SPI4` becomes
 ///   `Peri<'a, SPI4>`. Lifetimes don't cause monomorphization.
+#[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct Peri<'a, T: PeripheralType> {
     inner: T,
     _lifetime: PhantomData<&'a mut T>,