ACPI: change init_acpi_device_notify() to return void

This patch changes the type of the return value of the init_acpi_device_notify()
method to be void, as this method never fails and its return value is never
used.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index b9657af..1470ae4 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -351,13 +351,12 @@
 	return 0;
 }
 
-int __init init_acpi_device_notify(void)
+void __init init_acpi_device_notify(void)
 {
 	if (platform_notify || platform_notify_remove) {
 		printk(KERN_ERR PREFIX "Can't use platform_notify\n");
-		return 0;
+		return;
 	}
 	platform_notify = acpi_platform_notify;
 	platform_notify_remove = acpi_platform_notify_remove;
-	return 0;
 }