gpiolib: add gpio_device_get_base() stub for !GPIOLIB

Add empty stub of gpio_device_get_base() when GPIOLIB is not enabled.

Cc: <stable@vger.kernel.org>
Fixes: 8c85a102 ("gpiolib: provide gpio_device_get_base()")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

include/linux/gpio/driver.h

@@ -825,6 +825,12 @@ static inline struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc)
 	return ERR_PTR(-ENODEV);
 }
 
+static inline int gpio_device_get_base(struct gpio_device *gdev)
+{
+	WARN_ON(1);
+	return -ENODEV;
+}
+
 static inline int gpiochip_lock_as_irq(struct gpio_chip *gc,
 				       unsigned int offset)
 {