CONFIG_CPU_FA526 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_FA526 (not configurable)

modulename: proc-fa526.ko

configname: CONFIG_CPU_FA526

Linux Kernel Configuration
└─>CPU_FA526
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
The FA526 is a version of the ARMv4 compatible processor with
Branch Target Buffer, Unified TLB and cache line size 16.

Say Y if you want support for the FA526 processor.
Otherwise, say N.

source code: