gpio: Fix gpio_get -> gpiod_get typo in kernel-doc

The function is called gpiod_get(), not gpio_get(). Fix the kernel-doc
comment to match the name.
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib.c

@@ -2723,7 +2723,7 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
 }
 
 /**
- * gpio_get - obtain a GPIO for a given GPIO function
+ * gpiod_get - obtain a GPIO for a given GPIO function
  * @dev:	GPIO consumer, can be NULL for system-global GPIOs
  * @con_id:	function within the GPIO consumer
  *