!6976 nfp: flower: handle acti_netdevs allocation failure

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Chuang <liuchuang40@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/UEJKAC6TOR7KEQO2ON7YW55HR36YGBHD/ 
 
https://gitee.com/openeuler/kernel/issues/I9NDFD 
 
Link:https://gitee.com/openeuler/kernel/pulls/6976

 

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