[][MAC80211][hnat][Enable mtkhnat_util and ipt-conntrack-extra by default for Panther]

[Description]
Add mtkhnat_util and ipt-conntrack-extra to OpenWRT config.

If without this patch, HQoS can't be work by default.

[Release-log]
N/A


Change-Id: Id01ce7b8e9612137aa21ad008af06258838bb8b3
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6595767
Build: srv_hbgsm110
1 file changed