!13879  Fix problems of mounting nfs

Merge Pull Request from: @ci-robot 
 
PR sync from: Li Lingfeng <lilingfeng3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/AVXVUEZP7RNJ3YYFDSTMSIK5ITEM2L4D/ 
Li Lingfeng (2):
  nfs: pass flags to second superblock
  nfs: ignore SB_RDONLY when mounting nfs


-- 
2.31.1
 
https://gitee.com/openeuler/kernel/issues/IB42W1 
 
Link:https://gitee.com/openeuler/kernel/pulls/13879 

Reviewed-by: zhangyi (F) <yi.zhang@huawei.com> 
Reviewed-by: Yuan Can <yuancan@huawei.com> 
Signed-off-by: Yuan Can <yuancan@huawei.com>