PM / domains: Add late_initcall to disable unused PM domains

As default behavior let genpd at late init try to disable the unused
PM domains.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/domain.c

@@ -721,6 +721,13 @@ void pm_genpd_poweroff_unused(void)
 	mutex_unlock(&gpd_list_lock);
 }
 
+static int __init genpd_poweroff_unused(void)
+{
+	pm_genpd_poweroff_unused();
+	return 0;
+}
+late_initcall(genpd_poweroff_unused);
+
 #else
 
 static inline int genpd_dev_pm_qos_notifier(struct notifier_block *nb,