gpio: max730x: eliminate double free

The function __max730x_remove is called from the remove functions of
drivers/gpio/gpio-max7300.c and drivers/gpio/gpio-max7301.c.  In both
cases, the probe function allocates ts using devm_kzalloc.  Explicitly
freeing such a value with kfree will cause a double free.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-max730x.c

@@ -236,7 +236,6 @@ int __max730x_remove(struct device *dev)
 	ts->write(dev, 0x04, 0x00);
 	gpiochip_remove(&ts->chip);
 	mutex_destroy(&ts->lock);
-	kfree(ts);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(__max730x_remove);