arm64: add uaccess to machine check safe

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8M74H


CVE: NA

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If user process access memory fails due to hardware memory error, only the
relevant processes are affected, so it is more reasonable to kill the user
process and isolate the corrupt page than to panic the kernel.

Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>