libs/cbi: change usage of uvl error api after r5861
libs/cbi: change usage of uvl error api after r5861


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