evaluate: generate ether type payload after meta iiftype

evaluate: generate ether type payload after meta iiftype

Once the meta iiftype is generated, we shouldn't return from
resolve_protocol_conflict() since we also need to generate the ether
type payload implicit match after it.

This gets rid of the manual proto-ctx update from
meta_iiftype_gen_dependency() that we don't need since stmt_evaluate()
already handles this for us.

Moreover, skip error reporting once we verify that the protocol conflict
has been resolved.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>