CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE.
Result is shown for kernelversion 6.7-rc3

MTD0 is whole boot flash device

configname: CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE

Linux Kernel Configuration
└─>MTD0 is whole boot flash device
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
When this option is not set, mtd0 refers to the first partition
on the boot flash device. When set, mtd0 refers to the whole
device, with mtd1 referring to the first partition etc.