tcp_comp: add init and cleanup hook for compression

hulk inclusion
category: feature
bugzilla: NA
CVE: NA

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When establishing a tcp connection or closing it, the
tcp compression needs to be initialized or cleaned
up at the same time.

Add dummy init and cleanup hook for tcp compression.
It will be implemented later.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>