drm/nouveau/nvif: move internal class identifiers to class.h

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c b/drivers/gpu/drm/nouveau/nouveau_chan.c
index 1860f38..0a853ad 100644
--- a/drivers/gpu/drm/nouveau/nouveau_chan.c
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.c
@@ -378,7 +378,7 @@
 	/* allocate software object class (used for fences on <= nv05) */
 	if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 		ret = nvif_object_init(&chan->user, 0x006e,
-				       NVIF_IOCTL_NEW_V0_SW_NV04,
+				       NVIF_CLASS_SW_NV04,
 				       NULL, 0, &chan->nvsw);
 		if (ret)
 			return ret;