drm/nouveau: remove remnants of nouveau_pgraph_engine

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv20_graph.c b/drivers/gpu/drm/nouveau/nv20_graph.c
index b47e9e2..affc7d7 100644
--- a/drivers/gpu/drm/nouveau/nv20_graph.c
+++ b/drivers/gpu/drm/nouveau/nv20_graph.c
@@ -752,8 +752,7 @@
 			pgraph->grctx_user = 0x0000;
 			break;
 		default:
-			NV_ERROR(dev, "unknown nv20, disabling acceleration\n");
-			dev_priv->engine.graph.accel_blocked = true;
+			NV_ERROR(dev, "PGRAPH: unknown chipset\n");
 			return 0;
 		}
 	} else {
@@ -774,8 +773,7 @@
 			pgraph->grctx_size = NV35_36_GRCTX_SIZE;
 			break;
 		default:
-			NV_ERROR(dev, "unknown nv30, disabling acceleration\n");
-			dev_priv->engine.graph.accel_blocked = true;
+			NV_ERROR(dev, "PGRAPH: unknown chipset\n");
 			return 0;
 		}
 	}