drm/xe: fix build failure originating from backmerge

drm/xe: fix build failure originating from backmerge

../drivers/gpu/drm/xe/display/xe_display.c: In function ‘xe_display_pm_shutdown’:
../drivers/gpu/drm/xe/display/xe_display.c:382:27: error: passing argument 1 of ‘intel_dmc_suspend’ from incompatible pointer type [-Werror=incompatible-pointer-types]
  382 |         intel_dmc_suspend(xe);
      |                           ^~
      |                           |
      |                           struct xe_device *
In file included from ../drivers/gpu/drm/xe/display/xe_display.c:24:
../drivers/gpu/drm/i915/display/intel_dmc.h:22:46: note: expected ‘struct intel_display *’ but argument is of type ‘struct xe_device *’
   22 | void intel_dmc_suspend(struct intel_display *display);
      |                        ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~

Fixes: c141cf76918e ("Merge drm/drm-next into drm-intel-next")
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241022080943.763580-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>