gpiolib: unexport gpiochip_get_desc()

This function has been deprecated for some time and is now only used
within the GPIOLIB core. Remove it from the public header and unexport
it as all current users are linked against the compilation unit where
it is defined.

Link: https://lore.kernel.org/r/20240625073815.12376-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

drivers/gpio/gpiolib.c

@@ -179,7 +179,6 @@ struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc,
 {
 	return gpio_device_get_desc(gc->gpiodev, hwnum);
 }
-EXPORT_SYMBOL_GPL(gpiochip_get_desc);
 
 /**
  * gpio_device_get_desc() - get the GPIO descriptor corresponding to the given

drivers/gpio/gpiolib.h

@@ -243,6 +243,7 @@ int gpio_set_debounce_timeout(struct gpio_desc *desc, unsigned int debounce);
 int gpiod_hog(struct gpio_desc *desc, const char *name,
 		unsigned long lflags, enum gpiod_flags dflags);
 int gpiochip_get_ngpios(struct gpio_chip *gc, struct device *dev);
+struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum);
 const char *gpiod_get_label(struct gpio_desc *desc);
 
 /*

include/linux/gpio/driver.h

@@ -787,7 +787,6 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc,
 					    enum gpiod_flags dflags);
 void gpiochip_free_own_desc(struct gpio_desc *desc);
 
-struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum);
 struct gpio_desc *
 gpio_device_get_desc(struct gpio_device *gdev, unsigned int hwnum);