Revert "nft: prefer payload to ttl/hl module"/'meta pkttype' match.

Revert "nft: prefer payload to ttl/hl module"/'meta pkttype' match.

This reverts commit 8acaccf69c22fb195a0b88e28489792304728245.
This reverts commit 793caef9076cceb24336b6cbb8f55107de49f269.

As per ongoing discussion, keep the dissection side but keep using
nft_compat mode for now until we've figured out how to handle
backwards compatibility with older iptables-nft binaries dumping
the ruleset.

Furthermore, "nft: prefer native 'meta pkttype' instead of xt match"
broke ebtables: it has its own, incompatible pkttype match and needs
special handling.

Signed-off-by: Florian Westphal <fw@strlen.de>