livepatch: Add arch_klp_init

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5CJ7X



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For the ARM architecture, need to register the callback function for
processing BRK exception in advance.
Therefore, the architecture-related init interface needs to be provided.

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>