CONFIG_DEBUG_DAVINCI_DA8XX_UART2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Kernel low-level debugging on DaVinci DA8XX using UART2

configname: CONFIG_DEBUG_DAVINCI_DA8XX_UART2

Kernel low-level debugging port
└─>Kernel low-level debugging on DaVinci DA8XX using UART2
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say Y here if you want the debug print routines to direct
their output to UART2 serial port on DaVinci DA8XX devices.