!3828 openeuler_defconfig: enable erofs ondemand for x86 and arm64

Merge Pull Request from: @ci-robot 
 
PR sync from: Baokun Li <libaokun1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/PIX3BPRYMSCFHMONWDJEOWZ6KVFORVNV/ 
 
https://gitee.com/openeuler/kernel/issues/I8RP48 
 
Link:https://gitee.com/openeuler/kernel/pulls/3828

 

Reviewed-by: Hou Tao <houtao1@huawei.com>
Reviewed-by: Liu Chao <liuchao173@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>