Revert "pinctrl: remove pinctrl_remove_gpio_range"

This reverts earlier commit which removed
pinctrl_remove_gpio_range(), because at that time there
weren't any more users of that routine. It was removed as the
removal of ranges was done in unregister of pinctrl.

But as we are now registering stuff from gpiolib, we may
remove and insert a gpio module multiple times. So, we
need this routine again.

Signed-off-by: Viresh Kumar <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/core.c

···
 EXPORT_SYMBOL_GPL(pinctrl_add_gpio_ranges);
 
 /**
+ * pinctrl_remove_gpio_range() - remove a range of GPIOs fro a pin controller
+ * @pctldev: pin controller device to remove the range from
+ * @range: the GPIO range to remove
+ */
+void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
+			       struct pinctrl_gpio_range *range)
+{
+	mutex_lock(&pinctrl_mutex);
+	list_del(&range->node);
+	mutex_unlock(&pinctrl_mutex);
+}
+EXPORT_SYMBOL_GPL(pinctrl_remove_gpio_range);
+
+/**
  * pinctrl_get_group_selector() - returns the group selector for a group
  * @pctldev: the pin controller handling the group
  * @pin_group: the pin group to look up

include/linux/pinctrl/pinctrl.h

···
 extern void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev,
 				struct pinctrl_gpio_range *ranges,
 				unsigned nranges);
+extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
+				struct pinctrl_gpio_range *range);
 extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev);
 extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev);
 #else