!3381 cgroupv1 cgroup writeback enable

Merge Pull Request from: @chenridong 
 
cgroupv1 cgroup writeback enable
related issue:
https://gitee.com/openeuler/kernel/issues/I8LY4S 
 
Link:https://gitee.com/openeuler/kernel/pulls/3381

 

Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Liu Chao <liuchao173@huawei.com>
Reviewed-by: Lu Jialin <lujialin4@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>