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

Flash Memory Bank Control Register

configname: CONFIG_EBIU_FCTLVAL

Linux Kernel Configuration
└─>Blackfin Processor Options
└─>Flash Memory Bank Control Register
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
depends
CONFIG_BF54x