kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_AR600x_CUSTOM_XXX.
Result is shown for kernelversion 3.1.9

CUSTOM-xxx

configname: CONFIG_AR600x_CUSTOM_XXX

AR6003 Board Data Configuration
└─> CUSTOM-xxx

Board Data file for a custom reference design (File: should be named as bdata.CUSTOM.bin)