!10310 batman-adv: bypass empty buckets in batadv_purge_orig_ref()

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Jian <liujian56@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ZY4XLPIOSW3VMAIMEJMKYACQ5S4BG6EW/ 
 
https://gitee.com/src-openeuler/kernel/issues/IACS84 
 
Link:https://gitee.com/openeuler/kernel/pulls/10310

 

Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>