nouveau: fix r535 build on 32-bit arm.

This needs the proper division macros.

Reviewed-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030012814.1208972-1-airlied@gmail.com

drivers/gpu/drm/nouveau/nvkm/engine/fifo/r535.c

@@ -267,7 +267,7 @@ r535_chan_id_get_locked(struct nvkm_chan *chan, struct nvkm_memory *muserd, u64
 		return -EINVAL;
 	}
 
-	chid = ouserd / chan->func->userd->size;
+	chid = div_u64(ouserd, chan->func->userd->size);
 
 	list_for_each_entry(userd, &fifo->userd.list, head) {
 		if (userd->mem == muserd) {