ARM: s3c64xx: cpuidle: use init/exit common routine

Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/arm/mach-s3c64xx/cpuidle.c

@@ -40,8 +40,6 @@ static int s3c64xx_enter_idle(struct cpuidle_device *dev,
 	return index;
 }
 
-static DEFINE_PER_CPU(struct cpuidle_device, s3c64xx_cpuidle_device);
-
 static struct cpuidle_driver s3c64xx_cpuidle_driver = {
 	.name	= "s3c64xx_cpuidle",
 	.owner  = THIS_MODULE,
@@ -60,16 +58,6 @@ static struct cpuidle_driver s3c64xx_cpuidle_driver = {
 
 static int __init s3c64xx_init_cpuidle(void)
 {
-	int ret;
-
-	cpuidle_register_driver(&s3c64xx_cpuidle_driver);
-
-	ret = cpuidle_register_device(&s3c64xx_cpuidle_device);
-	if (ret) {
-		pr_err("Failed to register cpuidle device: %d\n", ret);
-		return ret;
-	}
-
-	return 0;
+	return cpuidle_register(&s3c64xx_cpuidle_driver, NULL);
 }
 device_initcall(s3c64xx_init_cpuidle);