tcp_comp: add Kconfig for tcp payload compression

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

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

Add config item CONFIG_TCP_COMP for tcp payload compression.

This allows payload compression handling of the TCP protocol
to be done in-kernel.

This patch only adds the CONFIG_TCP_COMP config, tcp compression
capability is implemented later.
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NWang Yufen <wangyufen@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NLu Wei <luwei32@huawei.com>
Reviewed-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

net/ipv4/Kconfig

@@ -742,3 +742,11 @@ config TCP_MD5SIG
 	  on the Internet.
 
 	  If unsure, say N.
+
+config TCP_COMP
+	bool "TCP: Transport Layer Compression support"
+	help
+          Enable kernel payload compression support for TCP protocol. This allows
+          payload compression handling of the TCP protocol to be done in-kernel.
+
+	  If unsure, say Y.