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



Linux Kernel Configuration
└─>CRIS v10 options
In linux kernel since version 2.6.12  
The R_SDRAM_CONFIG register specifies everything on how the SDRAM
chips in the system are connected to the ETRAX CPU. This is
different depending on the manufacturer, chip type and number of
chips. So this value often needs to be different for each Axis