netfilter: nf_tables: bogus EBUSY in chain deletions

commit bb7b40aecbf778c0c83a5bd62b0f03ca9f49a618 upstream.

When removing a rule that jumps to chain and such chain in the same
batch, this bogusly hits EBUSY. Add activate and deactivate operations
to expression that can be called from the preparation and the
commit/abort phases.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>