modules/niu: fix usage of mbssid_support() in niulib
modules/niu: fix usage of mbssid_support() in niulib


deepak78/luci,deepak78/luci,deepak78/luci,deepak78/luci,8devices/luci,8devices/luci,8devices/luci,deepak78/luci,deepak78/luci,deepak78/luci,deepak78/luci,8devices/luci,8devices/luci,8devices/luci