Revert "gpiolib: of: Introduce hook for missing gpio-ranges"

This reverts commit 3550bba2.

No users for this one, revert it for good.
The ->add_pin_ranges() can be used instead.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230113215352.44272-5-andriy.shevchenko@linux.intel.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib-of.c

@@ -981,11 +981,6 @@ static int of_gpiochip_add_pin_range(struct gpio_chip *chip)
 	if (!np)
 		return 0;
 
-	if (!of_property_read_bool(np, "gpio-ranges") &&
-	    chip->of_gpio_ranges_fallback) {
-		return chip->of_gpio_ranges_fallback(chip, np);
-	}
-
 	group_names = of_find_property(np, group_names_propname, NULL);
 
 	for (;; index++) {

include/linux/gpio/driver.h

@@ -525,18 +525,6 @@ struct gpio_chip {
 	 */
 	int (*of_xlate)(struct gpio_chip *gc,
 			const struct of_phandle_args *gpiospec, u32 *flags);
-
-	/**
-	 * @of_gpio_ranges_fallback:
-	 *
-	 * Optional hook for the case that no gpio-ranges property is defined
-	 * within the device tree node "np" (usually DT before introduction
-	 * of gpio-ranges). So this callback is helpful to provide the
-	 * necessary backward compatibility for the pin ranges.
-	 */
-	int (*of_gpio_ranges_fallback)(struct gpio_chip *gc,
-				       struct device_node *np);
-
 #endif /* CONFIG_OF_GPIO */
 };