Macro impl_wdt

macro_rules! impl_wdt {
    (
        hal: $HAL:ty,
        peripheral: $WDT:ty,
        mcusr: $MCUSR:ty,
        wdtcsr_name: $wdtcsr:ident,
        timeout: |$to:ident, $w:ident| $to_match:expr,
    ) => { ... };
}