rtc: rtc-pm8xxx: 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: 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-pm8xxx.c

@@ -480,7 +480,6 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
 fail_req_irq:
 	rtc_device_unregister(rtc_dd->rtc);
 fail_rtc_enable:
-	platform_set_drvdata(pdev, NULL);
 	kfree(rtc_dd);
 	return rc;
 }
@@ -492,7 +491,6 @@ static int pm8xxx_rtc_remove(struct platform_device *pdev)
 	device_init_wakeup(&pdev->dev, 0);
 	free_irq(rtc_dd->rtc_alarm_irq, rtc_dd);
 	rtc_device_unregister(rtc_dd->rtc);
-	platform_set_drvdata(pdev, NULL);
 	kfree(rtc_dd);
 
 	return 0;