[ncp] fix init order to resolve compiler warning (#8118)
[ncp] fix init order to resolve compiler warning (#8118)

srickardti/openthread,jwhui/openthread,openthread/openthread,srickardti/openthread,openthread/openthread,srickardti/openthread,openthread/openthread,srickardti/openthread,jwhui/openthread,openthread/openthread,jwhui/openthread,jwhui/openthread