[][openwrt][mt7988][tops][Change script 98-mtk-vpn]

[Description]
Change script '98-mtk-vpn' to allow L2TP binding in HNAT.
Without this patch, HNAT will be disabled whenever L2TP
interface is up.

[Release-log]
N/A


Change-Id: Ib8244d087dcda4a41441c1cb8afc9014d8850b43
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7506315
diff --git a/target/linux/mediatek/base-files/etc/hotplug.d/iface/98-mtk-vpn b/target/linux/mediatek/base-files/etc/hotplug.d/iface/98-mtk-vpn
index d169567..75812b2 100644
--- a/target/linux/mediatek/base-files/etc/hotplug.d/iface/98-mtk-vpn
+++ b/target/linux/mediatek/base-files/etc/hotplug.d/iface/98-mtk-vpn
@@ -2,7 +2,7 @@
 
 proto=`uci -q get network.$INTERFACE.proto`
 
-if [ "$proto" = l2tp ] || [ "$proto" = pptp ]; then
+if [ "$proto" = pptp ]; then
 	if [ "$ACTION" = ifup ]; then
 		echo 0 > /sys/kernel/debug/hnat/hook_toggle
 	elif [ "$ACTION" = ifdown ]; then