rtc: rtc-88pm80x: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release or on
probe failure, since commit 0998d063 ("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: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-88pm80x.c

@@ -345,7 +345,6 @@ static int pm80x_rtc_probe(struct platform_device *pdev)
 static int pm80x_rtc_remove(struct platform_device *pdev)
 {
 	struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
-	platform_set_drvdata(pdev, NULL);
 	pm80x_free_irq(info->chip, info->irq, info);
 	return 0;
 }