drm/nouveau: initial pass at moving to struct nvif_device

This is an attempt at isolating some of the changes necessary to port
to NVIF in a separate commit.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_fence.c

@@ -184,7 +184,7 @@ nouveau_fence_wait_uevent(struct nouveau_fence *fence, bool intr)
 
 {
 	struct nouveau_channel *chan = fence->channel;
-	struct nouveau_fifo *pfifo = nouveau_fifo(chan->drm->device);
+	struct nouveau_fifo *pfifo = nvkm_fifo(&chan->drm->device);
 	struct nouveau_fence_priv *priv = chan->drm->fence;
 	struct nouveau_fence_wait wait = { .priv = priv };
 	int ret = 0;