netfilter: bridge: nf_tables: add filter chain type
netfilter: bridge: nf_tables: add filter chain type

This patch adds the filter chain type which is required to
create filter chains in the bridge family from userspace.

Signed-off-by: Pablo Neira Ayuso <707d14912bb250caf67dfe0ea4035681fbfc4f56@netfilter.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs