88pm860x_charger: Remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release or on
probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(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: Anton Vorontsov <anton@enomsg.org>

drivers/power/88pm860x_charger.c

@@ -722,7 +722,6 @@ static int pm860x_charger_remove(struct platform_device *pdev)
 	struct pm860x_charger_info *info = platform_get_drvdata(pdev);
 	int i;
 
-	platform_set_drvdata(pdev, NULL);
 	power_supply_unregister(&info->usb);
 	free_irq(info->irq[0], info);
 	for (i = 0; i < info->irq_nums; i++)