drm/nouveau: log if accel is disabled by default on a chipset

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -946,6 +946,8 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 		case 0xc1: /* known broken */
 		case 0xc8: /* never tested */
 		case 0xce: /* never tested */
+			NV_INFO(dev, "acceleration disabled by default, pass "
+				     "noaccel=0 to force enable\n");
 			dev_priv->noaccel = true;
 			break;
 		default: