[][MAC80211][hnat][Separate the patch that binding when there is no ARP from the common part]

[Description]
Refactor the patch that perform binding when there is no ARP from the
common part.

[Release-log]
N/A


Change-Id: I632cd0252cc8cd8767c06375e75e74aeaa8cca36
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9146645
2 files changed