Bluetooth: Fix toggling background scan when changing connectable state

If the connectable state change doesn't require any special HCI commands
the set_connectable_update_settings() function is used instead of the
set_connectable_complete() function. We must therefore make sure to call
hci_update_background_scan() there as well. This code path is used also
when we're powered off, but that's fine since hci_update_background_scan()
has the necessary checks for it.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/mgmt.c

@@ -1794,8 +1794,10 @@ static int set_connectable_update_settings(struct hci_dev *hdev,
 	if (err < 0)
 		return err;
 
-	if (changed)
+	if (changed) {
+		hci_update_background_scan(hdev);
 		return new_settings(hdev, sk);
+	}
 
 	return 0;
 }