uce: get_user scenario support kernel recovery

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


CVE: NA

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This patch add uce kernel recovery path support in get_user.

get_user is implemented through macros and the uce kernel recovery use
kallsyms_lookup_size_offset to confirm the location of triggering uce
which based on function, Therefore, in order to make get_user support
uce kernel recovery, it needs to be implemented with function.

Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>