rust: error: Add declaration for ENOTRECOVERABLE error

Add a missing errno for ENOTRECOVERABLE.

Signed-off-by: Fabien Parent <[email protected]>

rust/kernel/error.rs

@@ -81,6 +81,7 @@ pub mod code {
     declare_err!(EIOCBQUEUED, "iocb queued, will get completion event.");
     declare_err!(ERECALLCONFLICT, "Conflict with recalled state.");
     declare_err!(ENOGRACE, "NFS file lock reclaim refused.");
+    declare_err!(ENOTRECOVERABLE, "State not recoverable.");
 }
 
 /// Generic integer kernel error.