gpio: remove unneeded code from gpio_device_get_desc()

The GPIO chip pointer is unused. Let's remove it.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/gpio/gpiolib.c

@@ -184,16 +184,6 @@ EXPORT_SYMBOL_GPL(gpiochip_get_desc);
 struct gpio_desc *
 gpio_device_get_desc(struct gpio_device *gdev, unsigned int hwnum)
 {
-	struct gpio_chip *gc;
-
-	/*
-	 * FIXME: This will be locked once we protect gdev->chip everywhere
-	 * with SRCU.
-	 */
-	gc = gdev->chip;
-	if (!gc)
-		return ERR_PTR(-ENODEV);
-
 	if (hwnum >= gdev->ngpio)
 		return ERR_PTR(-EINVAL);