CONFIG_ETRAX_NANDFLASH_BUSWIDTH is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_ETRAX_NANDFLASH_BUSWIDTH.
Result is shown for kernelversion 6.2.5

Buswidth of NAND flash in bytes


Linux Kernel Configuration
└─>Hardware setup
└─>Buswidth of NAND flash in bytes
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
Width in bytes of the NAND flash (1 or 2).