Merge branch 'working-hikey-tracking-bluetooth-v4.4' into working-hikey-mainline-rebase-v4.4-c30

* working-hikey-tracking-bluetooth-v4.4:
  Bluetooth: tty_hci: add LED support
  Bluetooth: Add LED triggers for bluetooth packet receive and transmit
  Revert "Revert "ti-st: add device tree support""
  Bluetooth: Add tty HCI driver
  btwilink: add minimal device tree support