rtc/rtc-88pm80x: assign ret only when rtc_register_driver fails

At the probe we are assigning ret to return value of PTR_ERR right after
the rtc_register_drive()r, as we would have done it in the if
(IS_ERR(ptr)) check, since the function fails and goes inside that case

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Ashish Jangam <ashish.jangam@kpitcummins.com>
Cc: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-88pm80x.c

@@ -314,8 +314,8 @@ static int __devinit pm80x_rtc_probe(struct platform_device *pdev)
 
 	info->rtc_dev = rtc_device_register("88pm80x-rtc", &pdev->dev,
 					    &pm80x_rtc_ops, THIS_MODULE);
-	ret = PTR_ERR(info->rtc_dev);
 	if (IS_ERR(info->rtc_dev)) {
+		ret = PTR_ERR(info->rtc_dev);
 		dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
 		goto out_rtc;
 	}