drm/xe/pf: Use div_u64 when calculating GGTT profile

drm/xe/pf: Use div_u64 when calculating GGTT profile

This will fix the following error seen on some 32-bit config:

"ERROR: modpost: "__udivdi3" [drivers/gpu/drm/xe/xe.ko] undefined!"

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511150929.3vUi6PEJ-lkp@intel.com/
Fixes: e448372e8a8e ("drm/xe/pf: Use migration-friendly GGTT auto-provisioning")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20251115151323.10828-1-michal.wajdeczko@intel.com