CONFIG_ETRAX_DDR2_MRS is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_ETRAX_DDR2_MRS.
Result is shown for kernelversion 6.7-rc3

DDR2 MRS

configname: CONFIG_ETRAX_DDR2_MRS

Linux Kernel Configuration
└─>Artpec-3 options
└─>DDR2 MRS
In linux kernel since version 2.6.25 (release Date: 2008-04-16)