rtc: rtc-vr41xx: 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>
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index b940c23..3b5b4fa 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -381,8 +381,6 @@
 	if (rtc)
 		rtc_device_unregister(rtc);
 
-	platform_set_drvdata(pdev, NULL);
-
 	free_irq(aie_irq, pdev);
 	free_irq(pie_irq, pdev);
 	if (rtc1_base)