drm/ttm: ttm_tt_init_fields() can be static

Fixes: 75a57669 ("drm/ttm: add ttm_sg_tt_init")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.kernel.org/patch/10263323/

drivers/gpu/drm/ttm/ttm_tt.c

@@ -223,8 +223,9 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
 	ttm->func->destroy(ttm);
 }
 
-void ttm_tt_init_fields(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
-			uint32_t page_flags)
+static void ttm_tt_init_fields(struct ttm_tt *ttm,
+			       struct ttm_buffer_object *bo,
+			       uint32_t page_flags)
 {
 	ttm->bdev = bo->bdev;
 	ttm->num_pages = bo->num_pages;