[][openvswitch][common][Fix IPv6 client can't get RA packet]

[Description]
Fix IPv6 client can't get RA packet
1. Bypass icmpv6 rs and ra packet

[Release-log]

Change-Id: Ie389492e5ae5c0b774a8aa37f84c98f46ef2ccdb
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8847553
1 file changed