drm/ttm: fix kerneldoc for ttm_lru_bulk_move

Update the kerneldoc for the members as well.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: b0e2c9ea ("drm/ttm: allow bulk moves for all domains")
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220413091242.638413-1-christian.koenig@amd.com