power: Silence non-critical warnings about CPUs sleeping

  * These spam the kernel log a lot, and they're not a symptom
    of malfunction. There's a patch that silences them
    properly, but it depends on the cpuhotplug stat machine,
    which does not exist in Linux 4.4.

Change-Id: I6f3972282cc8ac3de037b18dabc0fb7e38568b34

Author: Tomoms

drivers/base/power/main.c

@@ -128,9 +128,11 @@ void device_pm_add(struct device *dev)
 		 dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
 	device_pm_check_callbacks(dev);
 	mutex_lock(&dpm_list_mtx);
+#if 0
 	if (dev->parent && dev->parent->power.is_prepared)
 		dev_warn(dev, "parent %s should not be sleeping\n",
 			dev_name(dev->parent));
+#endif
 	list_add_tail(&dev->power.entry, &dpm_list);
 	mutex_unlock(&dpm_list_mtx);
 }