cfg-gate interrupt::free, use new name for embedded_hal.

Author: adamgreig

cortex-m/src/interrupt.rs

@@ -51,6 +51,7 @@ pub unsafe fn enable() {
 /// Execute closure `f` in an interrupt-free context.
 ///
 /// This as also known as a "critical section".
+#[cfg(cortex_m)]
 #[inline]
 pub fn free<F, R>(f: F) -> R
 where

cortex-m/src/prelude.rs

@@ -1,3 +1,3 @@
 //! Prelude
 
-pub use embedded_hal::prelude::*;
+pub use eh0::prelude::*;