drm/amdgpu: Fix comment style

Fix code comment style

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202504271826.xy2fFO28-lkp@intel.com/


Signed-off-by: Alex Deucher <alexander.deucher@amd.com>