RockPi4-Debian-ARM64-4.4.154.c83

This is a customized ARM64 build based on Debian 4.4.154.83 from Radxa (the manufacturer of Rock Pi 4)'s repositories. The major difference is this build disabled OTG support in the kernel, make it possible to run ssh over USB cable between multiple SBCs, e.g. 2 Rock Pi 4s or Rock Pi 4 and Google Coral Dev Board.