default or selected kernelversion does not have config value CONFIG_AR600x_SD31_XXX.
Result is shown for kernelversion 6.2.5
SD31-xxx
configname: CONFIG_AR600x_SD31_XXX
AR6003 Board Data Configuration
└─>SD31-xxx
In linux kernel since version 2.6.37 (release Date: 2011-01-04)
Board Data file for a standard SD31 reference design (File: bdata.SD31.bin)