CONFIG_CPU_FA526 is not available for the default architecture 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

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: