Revert "arm64: fix a concurrency issue in emulation_proc_handler()"

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I65RG3?from=project-issue


CVE: NA

--------------------------------

This reverts commit a569e359.

Because the list_add double bug has been fixed in linux stable 5.10 and
the related patches will be merged in this patch set.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>