drm/nv50: 0x50c0 apparently works on NVA3+ too, so lets allow it

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv50_graph.c b/drivers/gpu/drm/nouveau/nv50_graph.c
index 7a98d41..6785269 100644
--- a/drivers/gpu/drm/nouveau/nv50_graph.c
+++ b/drivers/gpu/drm/nouveau/nv50_graph.c
@@ -451,11 +451,10 @@
 	}
 
 	/* compute */
-	if (dev_priv->chipset <= 0xa0 ||
-	    dev_priv->chipset == 0xaa ||
-	    dev_priv->chipset == 0xac)
-		NVOBJ_CLASS(dev, 0x50c0, GR);
-	else
+	NVOBJ_CLASS(dev, 0x50c0, GR);
+	if (dev_priv->chipset  > 0xa0 &&
+	    dev_priv->chipset != 0xaa &&
+	    dev_priv->chipset != 0xac)
 		NVOBJ_CLASS(dev, 0x85c0, GR);
 
 	dev_priv->engine.graph.registered = true;