- PacketReceiver: change type of rxDataBuf to QVector
  - remove unused files
  - remove unused code
  - disable debug print
  - MlinkDeviceInterfaceBase: make ml_get_driver_status public
  - bump version 1.37.4
  - added conditional linux<5.6.0
  - Completed fix due to change in linux/proc_fs.h (from file_operations to proc_ops)
  - add proc_ops
  - workaround for RHEL 8.1 kernel 4.18.0-147.3.1 with access_ok() change backported from 5.0 kernel
  - improved debug messages
  - bump version 1.37.3