payload: automatically kill dependencies for exthdr and tcpopt

payload: automatically kill dependencies for exthdr and tcpopt

This patch automatically removes the dependencies for exthdr and tcpopt.

 # nft add rule filter input tcp option maxseg kind 3 counter.
 # nft list table filter input

Before:
 # ip protocol 6 tcp option maxseg kind 3 counter

After:
 # tcp option maxseg kind 3 counter

Thus allowing to write tests as follows:
 # tcp option maxseg kind 3;ok

Signed-off-by: Manuel Messner <mm@skelett.io>
Signed-off-by: Florian Westphal <fw@strlen.de>