Enable PNX8XX0 serial console

configname: CONFIG_SERIAL_PNX8XXX_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Enable PNX8XX0 serial console
In linux kernel since version 2.6.21.1 (release Date: 2007-04-27)  
If you have a MIPS-based Philips SoC such as PNX8330 and you want
to use serial console, say Y. Otherwise, say N.