rtc: rtc-rp5c01: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release or
on probe failure, since commit 0998d063100 ("device-core: Ensure drvdata
= NULL when no driver is bound").  Thus, it is not needed to manually
clear the device driver data to NULL.

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-rp5c01.c

@@ -251,21 +251,15 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
 
 	rtc = devm_rtc_device_register(&dev->dev, "rtc-rp5c01", &rp5c01_rtc_ops,
 				  THIS_MODULE);
-	if (IS_ERR(rtc)) {
-		error = PTR_ERR(rtc);
-		goto out;
-	}
+	if (IS_ERR(rtc))
+		return PTR_ERR(rtc);
 	priv->rtc = rtc;
 
 	error = sysfs_create_bin_file(&dev->dev.kobj, &priv->nvram_attr);
 	if (error)
-		goto out;
+		return error;
 
 	return 0;
-
-out:
-	platform_set_drvdata(dev, NULL);
-	return error;
 }
 
 static int __exit rp5c01_rtc_remove(struct platform_device *dev)