Support for console on Intel EG20T PCH UART/OKI SEMICONDUCTOR ML7213 IOH

configname: CONFIG_SERIAL_PCH_UART_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Support for console on Intel EG20T PCH UART/OKI SEMICONDUCTOR ML7213 IOH
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say Y here if you wish to use the PCH 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).