[][openwrt][mt7988][tops][support L2TP/IPSec]

[Description]
Add support for L2TP/IPSec by implementing l2_update function.

Remove MAC address comparation in 'tnl_info_match', since it will not be
correct util l2_update is called in L2TP/IPSec scenario.

[Release-log]
N/A

Change-Id: I83f3bc1972fd4648c274f32747928319ede46845
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7940616
1 file changed