[PATCH 20/20] drm/xe/display: move device_remove over to drmm

[kernel test robot]

Hi Matthew,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-xe/drm-xe-next]
[also build test WARNING on drm-misc/drm-misc-next next-20240510]
[cannot apply to linus/master v6.9-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Matthew-Auld/drm-drm_managed-try-to-improve-the-drmm-DOC/20240511-061452
base:   https://gitlab.freedesktop.org/drm/xe/kernel.git drm-xe-next
patch link:    https://lore.kernel.org/r/20240510181212.264622-42-matthew.auld%40intel.com
patch subject: [PATCH 20/20] drm/xe/display: move device_remove over to drmm
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20240511/202405111815.TdKOTxKQ-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240511/202405111815.TdKOTxKQ-lkp@intel.com/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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405111815.TdKOTxKQ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/xe/xe_device.c:18:
   drivers/gpu/drm/xe/display/xe_display.h: In function 'xe_display_probe':
>> drivers/gpu/drm/xe/display/xe_display.h:50:43: warning: no return statement in function returning non-void [-Wreturn-type]
      50 | static inline int xe_display_probe(struct xe_device *xe) { }
         |                                           ^~~~~~~~~


vim +50 drivers/gpu/drm/xe/display/xe_display.h

    49	
  > 50	static inline int xe_display_probe(struct xe_device *xe) { }
    51	

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