gpiolib: Export gpiod_configure_flags() to internal users

This is preparatory patch for enabling GPIO ACPI to configure a pin
accordingly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib.c

@@ -3224,7 +3224,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_optional);
  * requested function and/or index, or another IS_ERR() code if an error
  * occurred while trying to acquire the GPIO.
  */
-static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
+int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
 		unsigned long lflags, enum gpiod_flags dflags)
 {
 	int status;

drivers/gpio/gpiolib.h

@@ -200,6 +200,8 @@ struct gpio_desc {
 
 int gpiod_request(struct gpio_desc *desc, const char *label);
 void gpiod_free(struct gpio_desc *desc);
+int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
+		unsigned long lflags, enum gpiod_flags dflags);
 int gpiod_hog(struct gpio_desc *desc, const char *name,
 		unsigned long lflags, enum gpiod_flags dflags);