tcp_comp: implement sendmsg for tcp compression

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4PNEK


CVE: NA

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

This patch implement software level compression for
sending tcp messages. All of the TCP payload will be
compressed before xmit.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Lu Wei <luwei32@huawei.com>
Reviewed-by: Wang Yufen <wangyufen@huawei.com>
Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>