mm: Memory reliable features can only be disabled via proc interface

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SK3S


CVE: NA

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With the patch, Memory reliable features can only be disabled via
/proc/sys/vm/reliable_debug. Pervious features can be enabled via this
interface and this may lead to tricky counting or limit problem.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>