PM / Domains: Remove pm_genpd_poweroff_unused() API

As the last user of the pm_genpd_poweroff_unused() API has moved into
relying on genpd to deal with this internally from a late_initcall, let's
remove the API.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/domain.c

@@ -501,15 +501,15 @@ static int __init pd_ignore_unused_setup(char *__unused)
 __setup("pd_ignore_unused", pd_ignore_unused_setup);
 
 /**
- * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use.
+ * genpd_poweroff_unused - Power off all PM domains with no devices in use.
  */
-void pm_genpd_poweroff_unused(void)
+static int __init genpd_poweroff_unused(void)
 {
 	struct generic_pm_domain *genpd;
 
 	if (pd_ignore_unused) {
 		pr_warn("genpd: Not disabling unused power domains\n");
-		return;
+		return 0;
 	}
 
 	mutex_lock(&gpd_list_lock);
@@ -518,11 +518,7 @@ void pm_genpd_poweroff_unused(void)
 		genpd_queue_power_off_work(genpd);
 
 	mutex_unlock(&gpd_list_lock);
-}
 
-static int __init genpd_poweroff_unused(void)
-{
-	pm_genpd_poweroff_unused();
 	return 0;
 }
 late_initcall(genpd_poweroff_unused);

include/linux/pm_domain.h

@@ -125,9 +125,7 @@ extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
 				     struct generic_pm_domain *target);
 extern void pm_genpd_init(struct generic_pm_domain *genpd,
 			  struct dev_power_governor *gov, bool is_off);
-
 extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
-extern void pm_genpd_poweroff_unused(void);
 
 extern struct dev_power_governor simple_qos_governor;
 extern struct dev_power_governor pm_domain_always_on_gov;
@@ -170,7 +168,6 @@ static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
 {
 	return -ENOSYS;
 }
-static inline void pm_genpd_poweroff_unused(void) {}
 #endif
 
 static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,