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

examples/stm32f0/src/bin/hello.rs

@@ -12,7 +12,7 @@ use embassy_stm32::Peripherals;
 #[path = "../example_common.rs"]
 mod example_common;
 
-#[embassy::main(config = "example_common::config()")]
+#[embassy::main]
 async fn main(_spawner: Spawner, _p: Peripherals) -> ! {
     loop {
         Timer::after(Duration::from_secs(1)).await;