driver core: bus: constify bus_rescan_devices()

The bus_rescan_devices() function was missed in the previous change of
the bus_for_each* constant pointer changes, so fix it up now to take a
const * to struct bus_type.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230313182918.1312597-25-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/bus.c

@@ -769,7 +769,7 @@ static int __must_check bus_rescan_devices_helper(struct device *dev,
  * attached and rescan it against existing drivers to see if it matches
  * any by calling device_attach() for the unbound devices.
  */
-int bus_rescan_devices(struct bus_type *bus)
+int bus_rescan_devices(const struct bus_type *bus)
 {
 	return bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
 }

include/linux/device/bus.h

@@ -114,7 +114,7 @@ extern int __must_check bus_register(const struct bus_type *bus);
 
 extern void bus_unregister(const struct bus_type *bus);
 
-extern int __must_check bus_rescan_devices(struct bus_type *bus);
+extern int __must_check bus_rescan_devices(const struct bus_type *bus);
 
 struct bus_attribute {
 	struct attribute	attr;