mm: Disable memory reliable when kdump is in progress

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


CVE: NA

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Kdump only have limited memory and will lead to bugly memory reliable
features if memory reliable if enabled. So disable memory reliable if kdump
is in progress.

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