[][Kernel][hnat][Fix ipv4 in ipv6 packets can't be bind in MAPE scene]

[Description]
Fix ipv4 in ipv6 packets can't be bind in MAPE scene.
Move the action of checking ip framgnet packets from
mtk_hnat_nf_post_routing to skb_to_hnat_info.

[Release-log]
N/A


Change-Id: I11db24f10a7c6b4221e84c86d8633af801dd5f25
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7908925
1 file changed