rust: drm: update ARef and AlwaysRefCounted imports from sync::aref

Update call sites in drm to import `ARef` and
`AlwaysRefCounted` from `sync::aref` instead of `types`.

This aligns with the ongoing effort to move `ARef` and
`AlwaysRefCounted` to sync.

Suggested-by: Benno Lossin <lossin@kernel.org>
Link: Rust-for-Linux/linux#1173
Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com>
Reviewed-by: Benno Lossin <lossin@kernel.org>
Reviewed-by: Elle Rhumsaa <elle@weathered-steel.dev>
Link: https://lore.kernel.org/r/20250815161706.1324860-1-shankari.ak0208@gmail.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

Author: Shankari02

rust/kernel/drm/device.rs

@@ -10,7 +10,8 @@ use crate::{
     error::from_err_ptr,
     error::Result,
     prelude::*,
-    types::{ARef, AlwaysRefCounted, Opaque},
+    sync::aref::{ARef, AlwaysRefCounted},
+    types::Opaque,
 };
 use core::{mem, ops::Deref, ptr, ptr::NonNull};
 

rust/kernel/drm/driver.rs

@@ -8,7 +8,7 @@ use crate::{
     bindings, device, devres, drm,
     error::{to_result, Result},
     prelude::*,
-    types::ARef,
+    sync::aref::ARef,
 };
 use macros::vtable;
 

rust/kernel/drm/gem/mod.rs

@@ -10,7 +10,8 @@ use crate::{
     drm::driver::{AllocImpl, AllocOps},
     error::{to_result, Result},
     prelude::*,
-    types::{ARef, AlwaysRefCounted, Opaque},
+    sync::aref::{ARef, AlwaysRefCounted},
+    types::Opaque,
 };
 use core::{mem, ops::Deref, ptr::NonNull};