pinctrl: sh-pfc: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sh-pfc/core.c

@@ -539,8 +539,6 @@ static int sh_pfc_remove(struct platform_device *pdev)
 	if (pfc->info->ops && pfc->info->ops->exit)
 		pfc->info->ops->exit(pfc);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }