parser_bison: show all sets via list sets with no family

parser_bison: show all sets via list sets with no family

Default to the same behaviour that we get through `list ruleset', ie.

 # nft list sets
 table ip test1 {
        set foo {
                type ipv4_addr
        }
 }
 table ip6 test2 {
        set bar {
                type ipv6_addr
        }
 }

 # nft list sets ip
 table ip test1 {
        set foo {
                type ipv4_addr
        }
 }

 # nft list sets ip6
 table ip6 test2 {
        set bar {
                type ipv6_addr
        }
 }

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>