rstp: Enable force_link for lan interface as default

Change-Id: I318f5df920ad04b2f6789da70c70b8bbefbb8244
Signed-off-by: Ram Chandra Jangir <quic_rjangir@quicinc.com>

rstp/files/etc/init.d/rstp

@@ -204,6 +204,12 @@ brctl_stp_on_or_off() {
 start() {
 	local rstp_enable autoMode ifname
 
+	force_link=$(uci -q get network.lan.force_link)
+	[ "$force_link" != "1" ] && {
+		uci set network.lan.force_link=1
+		uci commit network
+	}
+
 	config_load "rstp"
 
 	config_get rstp_enable global enable 0