drm/nouveau/ttm: memcpy waits for bo already

no need for driver to wait here.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200924051845.397177-29-airlied@gmail.com

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -1085,8 +1085,6 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict,
 	}
 
 	/* Fallback to software copy. */
-	ret = ttm_bo_wait_ctx(bo, ctx);
-	if (ret == 0)
 	ret = ttm_bo_move_memcpy(bo, ctx, new_reg);
 
 out: