gpio: lynxpoint: 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>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-lynxpoint.c

@@ -447,7 +447,6 @@ static int lp_gpio_remove(struct platform_device *pdev)
 	err = gpiochip_remove(&lg->chip);
 	if (err)
 		dev_warn(&pdev->dev, "failed to remove gpio_chip.\n");
-	platform_set_drvdata(pdev, NULL);
 	return 0;
 }