gpio: 104-dio-48e: Remove unnecessary driver_data set

Setting driver_data was necessary to access private data in the
dio48e_remove function. Now that the dio48e_remove function is gone,
driver_data is no longer used. This patch removes the relevant code.
Signed-off-by: NWilliam Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-104-dio-48e.c

@@ -369,8 +369,6 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 
 	spin_lock_init(&dio48egpio->lock);
 
-	dev_set_drvdata(dev, dio48egpio);
-
 	err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio);
 	if (err) {
 		dev_err(dev, "GPIO registering failed (%d)\n", err);