rust: Enable const_mut_refs feature for the kernel crate

Needed by the rust-for-linux/rust module_param module.

Signed-off-by: Asahi Lina <[email protected]>

Author: asahilina

rust/kernel/lib.rs

@@ -14,6 +14,7 @@
 #![no_std]
 #![feature(allocator_api)]
 #![feature(coerce_unsized)]
+#![feature(const_mut_refs)]
 #![feature(core_ffi_c)]
 #![feature(dispatch_from_dyn)]
 #![feature(generic_associated_types)]