warning: unresolved link to `kernel::drm::Device`

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fab1beda7597fac1cecc01707d55eadb6bbe773c
commit: d6e26c1ae4a602d8b7eeb39e23514f6f98d91eb5 device: rust: expand documentation for Device
date:   2 weeks ago
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250826/202508261644.9LclwUgt-lkp@xxxxxxxxx/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250826/202508261644.9LclwUgt-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508261644.9LclwUgt-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> warning: unresolved link to `kernel::drm::Device`
   --> rust/kernel/device.rs:154:22
   |
   154 | /// [`drm::Device`]: kernel::drm::Device
   |                      ^^^^^^^^^^^^^^^^^^^ no item named `drm` in module `kernel`
   |
   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default

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