hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4UAQ1

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Introduce 'struct arch_klp_data' to encapsulate arch related data.

Preparatory for moving 'struct klp_func_node' out of 'arch' and
reducing duplicated codes.
Signed-off-by: NZheng Yejian <zhengyejian1@huawei.com>
Reviewed-by: NKuohai Xu <xukuohai@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>