[][MAC80211][hnat][Add Netfilter Netlink Ftnl package]

[Description]
Add Netfilter Netlink Ftnl package.
    - Delete specific PPE entry: ftnl -D --sip=192.168.1.3 --dip=10.10.10.3
      --proto=tcp --sport=1234 --dport=5678
    - Flush all PPE entries: ftnl -F

If without this patch, user cannot delete or fluse PPE entries manually.

[Release-log]
N/A


Change-Id: I5d50840e5565b100421ded580ed0f68fe7d08edc
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7190260
2 files changed