Address clippy warnings

src/common/lpspi.rs

@@ -1420,12 +1420,12 @@ struct ReceiveBuffer<'a, W> {
     _buffer: PhantomData<&'a [W]>,
 }
 
-impl<'a, W> ReceiveBuffer<'a, W>
+impl<W> ReceiveBuffer<'_, W>
 where
     W: Word,
 {
     #[cfg(test)] // TODO(mciantyre) remove once needed in non-test code.
-    fn new(buffer: &'a mut [W]) -> Self {
+    fn new(buffer: &mut [W]) -> Self {
         // Safety: pointer offset math meets expectations.
         unsafe { Self::from_raw(buffer.as_mut_ptr(), buffer.len()) }
     }
@@ -1482,7 +1482,7 @@ const fn per_word<W: Word>() -> usize {
 
 /// Computes how many u32 words we need to transact this buffer.
 const fn word_count<W: Word>(words: &[W]) -> usize {
-    (words.len() + per_word::<W>() - 1) / per_word::<W>()
+    words.len().div_ceil(per_word::<W>())
 }
 
 /// Creates the transmit and receive buffer objects for an