driver core: make subsys_dev_iter_exit() static

The function subsys_dev_iter_exit() is not used outside of
drivers/base/bus.c so make it static to that file and remove the global
export.
Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230109175810.2965448-5-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/bus.c

@@ -968,11 +968,10 @@ static struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter)
  * Finish an iteration.  Always call this function after iteration is
  * complete whether the iteration ran till the end or not.
  */
-void subsys_dev_iter_exit(struct subsys_dev_iter *iter)
+static void subsys_dev_iter_exit(struct subsys_dev_iter *iter)
 {
 	klist_iter_exit(&iter->ki);
 }
-EXPORT_SYMBOL_GPL(subsys_dev_iter_exit);
 
 int subsys_interface_register(struct subsys_interface *sif)
 {

include/linux/device/bus.h

@@ -154,7 +154,6 @@ struct subsys_dev_iter {
 	struct klist_iter		ki;
 	const struct device_type	*type;
 };
-void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
 
 int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
 		     int (*fn)(struct device *dev, void *data));