CONFIG_CPU_FEROCEON_OLD_ID is not available for the selected architecture x86.
Result is shown for architecture arm

Accept early Feroceon cores with an ARM926 ID

configname: CONFIG_CPU_FEROCEON_OLD_ID

Linux Kernel Configuration
└─>Accept early Feroceon cores with an ARM926 ID
In linux kernel since version 2.6.25 (release Date: 2008-04-16)
This enables the usage of some old Feroceon cores
for which the CPU ID is equal to the ARM926 ID.
Relevant for Feroceon-1850 and early Feroceon-2850.