arm64/ascend: Enable CONFIG_ASCEND_OOM for openeuler_defconfig

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4K2U5


CVE: NA

-------------------------------------------------

Enable the ascend oom control features for openeuler_defconfig default config.

Signed-off-by: Zhang Jian <zhangjian210@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>