mm: Fix reliable_debug in proc not consistent with boot parameter problem

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


CVE: NA

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Now reliable_debug will be consistent with boot parameter. If
reliable_debug in boot parameter is set t "F", reliable_debug in proc will
be 13 which means only fallback is closed.

Fixes: 851a3ff0 ("mm: Introduce proc interface to control memory reliable features")
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>