ipq807x: cig.wf186w: Add MPSK Dynamic VLAN support

When a MPSK VLAN netdev is created on the cig.wf186w board, this script
will configure switch0 via swconfig for the corresponding VLAN

Signed-off-by: Paul White <paul@shasta.cloud>

feeds/ipq807x/ipq807x/base-files/etc/hotplug.d/net/50-dvlan

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+. /lib/functions.sh
+
+debug() {
+	logger -t HOTPLUG-DVLAN "$*"
+}
+
+if [ "${INTERFACE:0:4}" != "wlan" ]; then
+	exit 0
+fi
+
+case "$(board_name)" in
+	"cig,wf186w")
+		wan_iface="eth0"
+		switch_dev="switch0"
+		switch_wan_port=4
+		switch_cpu_port=6
+		;;
+
+	*)
+		exit 0
+esac
+
+VSTR="$(echo $INTERFACE | egrep -o 'v([0-9]+)$')"
+[ -z "$VSTR" ] && exit 0
+VID="${VSTR:1}"
+[ $VID -lt 1 -o $VID -gt 4096 ] && exit 0
+
+if [ "$ACTION" = "add" ]; then
+	debug "[$INTERFACE] Dynamic VLAN $VID added, configuring switch"
+	swconfig dev ${switch_dev} vlan $VID set ports "${switch_wan_port}t ${switch_cpu_port}t"
+elif [ "$ACTION" = "remove" ]; then
+	let cnt="$(bridge vlan show vid $VID | egrep "^wlan" | wc -l)"
+	debug "[$INTERFACE] Dynamic VLAN interface removed, references left = $cnt"
+	if [ $cnt -eq 0 ]; then
+		debug "[$INTERFACE] No more references, removing $VID from switch"
+		swconfig dev ${switch_dev} vlan $VID set ports ""
+	fi
+fi