rust: block: normalize imports for gen_disk.rs

Clean up the import statements in `gen_disk.rs` to make the code easier to
maintain.

Signed-off-by: Andreas Hindborg <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>

Author: Andreas Hindborg

rust/kernel/block/mq/gen_disk.rs

@@ -5,9 +5,13 @@
 //! C header: [`include/linux/blkdev.h`](srctree/include/linux/blkdev.h)
 //! C header: [`include/linux/blk_mq.h`](srctree/include/linux/blk_mq.h)
 
-use crate::block::mq::{raw_writer::RawWriter, Operations, TagSet};
-use crate::{bindings, error::from_err_ptr, error::Result, sync::Arc};
-use crate::{error, static_lock_class};
+use crate::{
+    bindings,
+    block::mq::{raw_writer::RawWriter, Operations, TagSet},
+    error::{self, from_err_ptr, Result},
+    static_lock_class,
+    sync::Arc,
+};
 use core::fmt::{self, Write};
 
 /// A builder for [`GenDisk`].