zephyr: clippy: Add a few Default implementations

Clippy complains about implementing a zero-argument `new` function
without also implementing a `Default`.  Add these Default
implementations to satisfy this.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

zephyr/src/align.rs

@@ -48,3 +48,12 @@ where
         AlignAs([])
     }
 }
+
+impl<const N: usize> Default for AlignAs<N>
+where
+    AlignAsStruct: AlignAsTrait<N>,
+{
+    fn default() -> Self {
+        Self::new()
+    }
+}

zephyr/src/sync/mutex.rs

@@ -238,6 +238,13 @@ impl Condvar {
     }
 }
 
+#[cfg(CONFIG_RUST_ALLOC)]
+impl Default for Condvar {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl fmt::Debug for Condvar {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "Condvar {:?}", self.inner)

zephyr/src/timer.rs

@@ -136,6 +136,12 @@ impl fmt::Debug for StoppedTimer {
     }
 }
 
+impl Default for StoppedTimer {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 /// A statically allocated `k_timer` (StoppedTimer).
 ///
 /// This is intended to be used from within the `kobj_define!` macro.  It declares a static