stm32: move dbgmcu stuff to toplevel config setting, defaulting to true.

examples/stm32f4/src/bin/can.rs

@@ -10,7 +10,6 @@ mod example_common;
 use cortex_m_rt::entry;
 use embassy_stm32::can::filter::Mask32;
 use embassy_stm32::can::{Can, Frame, StandardId};
-use embassy_stm32::dbgmcu::Dbgmcu;
 use embassy_stm32::gpio::{Input, Pull};
 use example_common::*;
 
@@ -18,10 +17,6 @@ use example_common::*;
 fn main() -> ! {
     info!("Hello World!");
 
-    unsafe {
-        Dbgmcu::enable_all();
-    }
-
     let mut p = embassy_stm32::init(Default::default());
 
     // The next two lines are a workaround for testing without transceiver.