[rstp] Make rstp daemon work properly afer reboot

Avoid rstp start and restart run simultaneously during boot time.

Change-Id: If7fabfb4085a55a733fc4f8d44ebcd408e5024bf
Signed-off-by: Casey Chen <kexinc@codeaurora.org>

rstp/files/etc/hotplug.d/iface/75-rstp

@@ -33,6 +33,7 @@ rstpctl_bridge_list() {
 			if [ "$autoMode" = "1" ] ; then
 				network_get_device lanifname lan
 				if [ "$lanifname" = "$ifname" ]; then
+					sleep 1
 					/etc/init.d/rstp restart
 				fi
 			else