rtc: rtc-wm8350: use devm_rtc_device_register()

devm_rtc_device_register() is device managed and makes cleanup paths
simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-wm8350.c

@@ -439,7 +439,7 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	wm_rtc->rtc = rtc_device_register("wm8350", &pdev->dev,
+	wm_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm8350",
 					&wm8350_rtc_ops, THIS_MODULE);
 	if (IS_ERR(wm_rtc->rtc)) {
 		ret = PTR_ERR(wm_rtc->rtc);
@@ -462,13 +462,10 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 static int wm8350_rtc_remove(struct platform_device *pdev)
 {
 	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
-	struct wm8350_rtc *wm_rtc = &wm8350->rtc;
 
 	wm8350_free_irq(wm8350, WM8350_IRQ_RTC_SEC, wm8350);
 	wm8350_free_irq(wm8350, WM8350_IRQ_RTC_ALM, wm8350);
 
-	rtc_device_unregister(wm_rtc->rtc);
-
 	return 0;
 }