lint: allow the identity-op warning

Ignores the warning for the `clippy::identity_op` to allow using ranged
bitfield CSR macro arguments with a leading `0`.

Author: rmsyn

riscv/src/lib.rs

@@ -35,6 +35,7 @@
 #![no_std]
 #![allow(clippy::missing_safety_doc)]
 #![allow(clippy::eq_op)]
+#![allow(clippy::identity_op)]
 
 pub use paste::paste;