Console on Actions Semi Owl serial port

configname: CONFIG_SERIAL_OWL_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Console on Actions Semi Owl serial port
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say 'Y' here if you wish to use Actions Semiconductor S500/S900 UART
as the system console.