rtc: rtc-lpc32xx: 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-lpc32xx.c

@@ -277,7 +277,6 @@ static int lpc32xx_rtc_probe(struct platform_device *pdev)
 					&lpc32xx_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc)) {
 		dev_err(&pdev->dev, "Can't get RTC\n");
-		platform_set_drvdata(pdev, NULL);
 		return PTR_ERR(rtc->rtc);
 	}
 
@@ -306,8 +305,6 @@ static int lpc32xx_rtc_remove(struct platform_device *pdev)
 	if (rtc->irq >= 0)
 		device_init_wakeup(&pdev->dev, 0);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }