Disable clippy lint needless_pass_by_ref_mut

We sometimes use &mut to guarantee exclusive access to some ressource,
where the compiler can't see that such a guarantee is needed for
soundness. Therefore, warnings about needles &mut references should
not be generated.

rp2040-hal/src/lib.rs

@@ -37,6 +37,11 @@
 
 #![warn(missing_docs)]
 #![no_std]
+// We sometimes use &mut to guarantee exclusive access to some ressource,
+// where the compiler can't see that such a guarantee is needed for
+// soundness. Therefore, warnings about needles &mut references should
+// not be generated.
+#![allow(clippy::needless_pass_by_ref_mut)]
 
 pub use paste;