gpiolib: export devprop_gpiochip_set_names()

This function is needed in mcp23s08. That driver is a special snowflake
because it supports several hardware chips as a single "GPIO chip" under
Linux.
Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Phil Reid <preid@electromag.com.au>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib-devprop.c

@@ -56,3 +56,5 @@ void devprop_gpiochip_set_names(struct gpio_chip *chip,
 
 	kfree(names);
 }
+
+EXPORT_SYMBOL_GPL(devprop_gpiochip_set_names)

drivers/gpio/gpiolib.h

@@ -243,9 +243,6 @@ static inline int gpio_chip_hwgpio(const struct gpio_desc *desc)
 	return desc - &desc->gdev->descs[0];
 }
 
-void devprop_gpiochip_set_names(struct gpio_chip *chip,
-				const struct fwnode_handle *fwnode);
-
 /* With descriptor prefix */
 
 #define gpiod_emerg(desc, fmt, ...)					       \

include/linux/gpio/driver.h

@@ -614,6 +614,9 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
 					    enum gpiod_flags flags);
 void gpiochip_free_own_desc(struct gpio_desc *desc);
 
+void devprop_gpiochip_set_names(struct gpio_chip *chip,
+				const struct fwnode_handle *fwnode);
+
 #else /* CONFIG_GPIOLIB */
 
 static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)