livepatch/x86: support livepatch without ftrace

hulk inclusion
category: feature
bugzilla: 51919
CVE: NA

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support livepatch without ftrace for x86_64

supported now:
        livepatch relocation when init_patch after load_module;
        instruction patched when enable;
	activeness function check;
	enforcing the patch stacking principle;

x86_64 use variable length instruction, so there's no need to consider
extra implementation for long jumps.

Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>
Signed-off-by: Li Bin <huawei.libin@huawei.com>
Tested-by: Yang ZuoTing <yangzuoting@huawei.com>
Tested-by: Cheng Jian <cj.chengjian@huawei.com>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>

Signed-off-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Yang Jihong <yangjihong1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>