Console on Marvell EBU serial port

configname: CONFIG_SERIAL_MVEBU_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Console on Marvell EBU serial port
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Say 'Y' here if you wish to use Armada-3700 UART as the system console.
(the system console is the device which receives all kernel messages
and warnings and which allows logins in single user mode)
Otherwise, say 'N'.