gpio: OF: localize some gpiochip init functions

of_gpiochip_add() and of_gpiochip_remove() are only used locally
in the gpio subsystem so move these functions to the local
header.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib.h

@@ -92,6 +92,8 @@ struct gpio_desc *of_find_gpio(struct device *dev,
 			       const char *con_id,
 			       unsigned int idx,
 			       enum gpio_lookup_flags *flags);
+int of_gpiochip_add(struct gpio_chip *gc);
+void of_gpiochip_remove(struct gpio_chip *gc);
 #else
 static inline struct gpio_desc *of_find_gpio(struct device *dev,
 					     const char *con_id,
@@ -100,6 +102,8 @@ static inline struct gpio_desc *of_find_gpio(struct device *dev,
 {
 	return ERR_PTR(-ENOENT);
 }
+static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; }
+static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
 #endif /* CONFIG_OF_GPIO */
 
 #ifdef CONFIG_ACPI

include/linux/of_gpio.h

@@ -61,8 +61,6 @@ static inline int of_mm_gpiochip_add(struct device_node *np,
 }
 extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc);
 
-extern int of_gpiochip_add(struct gpio_chip *gc);
-extern void of_gpiochip_remove(struct gpio_chip *gc);
 extern int of_gpio_simple_xlate(struct gpio_chip *gc,
 				const struct of_phandle_args *gpiospec,
 				u32 *flags);
@@ -86,9 +84,6 @@ static inline int of_gpio_simple_xlate(struct gpio_chip *gc,
 	return -ENOSYS;
 }
 
-static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; }
-static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
-
 #endif /* CONFIG_OF_GPIO */
 
 /**