mm/hugetlb: Allocate non-mirrored memory by default

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8USBA


CVE: NA

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Previous memory allocation in memblock for hugetlb may use mirrored or
non-mirrored memory depends on the system's memory status. However this is
not suitable if hugetlb user want to alloc memory from non-mirrored memory
if memory reliable is enabled.

In order to solve this problem, hugetlb use MEMBLOCK_NOMIRROR flag to alloc
memory from non-mirrored region without fallback to mirrored region.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>