drm/nouveau/devinit/nv04: change owner to int

We use -1 to mean "not read from hw yet"
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/nv04.h

@@ -5,7 +5,7 @@ struct nvkm_pll_vals;
 
 struct nv04_devinit_priv {
 	struct nvkm_devinit base;
-	u8 owner;
+	int owner;
 };
 
 int  nv04_devinit_ctor(struct nvkm_object *, struct nvkm_object *,