Use Dbgmcu::enable_all() in stm32f4 examples

examples/stm32f4/src/bin/blinky.rs

@@ -8,8 +8,8 @@
 
 #[path = "../example_common.rs"]
 mod example_common;
+use embassy_stm32::dbgmcu::Dbgmcu;
 use embassy_stm32::gpio::{Level, Output, Speed};
-use embassy_stm32::pac;
 use embedded_hal::digital::v2::OutputPin;
 use example_common::*;
 
@@ -20,11 +20,7 @@ fn main() -> ! {
     info!("Hello World!");
 
     unsafe {
-        pac::DBGMCU.cr().modify(|w| {
-            w.set_dbg_sleep(true);
-            w.set_dbg_standby(true);
-            w.set_dbg_stop(true);
-        });
+        Dbgmcu::enable_all();
     }
 
     let p = embassy_stm32::init(Default::default());