drm/nouveau: expose the full object/event interfaces to userspace

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_nvif.c b/drivers/gpu/drm/nouveau/nouveau_nvif.c
index c3838bf..47ca886 100644
--- a/drivers/gpu/drm/nouveau/nouveau_nvif.c
+++ b/drivers/gpu/drm/nouveau/nouveau_nvif.c
@@ -37,6 +37,7 @@
 #include <nvif/ioctl.h>
 
 #include "nouveau_drm.h"
+#include "nouveau_usif.h"
 
 static void
 nvkm_client_unmap(void *priv, void *ptr, u32 size)
@@ -95,6 +96,8 @@
 	switch (route) {
 	case NVDRM_NOTIFY_NVIF:
 		return nvif_notify(header, length, data, size);
+	case NVDRM_NOTIFY_USIF:
+		return usif_notify(header, length, data, size);
 	default:
 		WARN_ON(1);
 		break;