CONFIG_DA830_UI_NAND is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_DA830_UI_NAND.
Result is shown for kernelversion 6.9.9

NAND flash

configname: CONFIG_DA830_UI_NAND

Select DA830/OMAP-L137/AM17x UI board peripheral
└─>NAND flash
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Say Y here to use the NAND flash. Do not forget to setup
the switch correctly.