rust: drm: use new sync::aref path for imports

ARef and AlwaysRefCounted are being moved to sync::aref, and the
re-exports under types are planned to be removed. Thus, update imports
to the new path.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260326-drm-rust-next-fix-aref-v1-2-7f6f58d2828a@google.com
Signed-off-by: Alice Ryhl <aliceryhl@google.com>

rust/kernel/drm/gem/mod.rs

@@ -39,7 +39,7 @@ impl $( <$( $tparam_id:ident ),+> )? for $type:ty
         )?
     ) => {
         // SAFETY: All GEM objects are refcounted.
-        unsafe impl $( <$( $tparam_id ),+> )? $crate::types::AlwaysRefCounted for $type
+        unsafe impl $( <$( $tparam_id ),+> )? $crate::sync::aref::AlwaysRefCounted for $type
         where
             Self: IntoGEMObject,
             $( $( $bind_param : $bind_trait ),+ )?