message: [ncp] fix the default return value of RequestEvent
diff: @@ -140,7 +140,7 @@ bool ControllerOpenThread::IsResetRequested(void)
  otbrError ControllerOpenThread::RequestEvent(int aEvent)
  {
  - otbrError ret = OTBR_ERROR_ERRNO;
  + otbrError ret = OTBR_ERROR_NONE;
  switch (aEvent)
  {
  