drm/xe/debugfs: Make ggtt file per-tile
Due to initial lack of per-tile debugfs directories, the ggtt file
attribute was created as per-GT file. Fix that since now we have
proper per-tile directories.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://lore.kernel.org/r/20250919160430.573-2-michal.wajdeczko@intel.com