default or selected kernelversion does not have config value CONFIG_GENERIC_CPU_AUTOPROBE.
Result is shown for kernelversion 6.9-rc5

CONFIG_GENERIC_CPU_AUTOPROBE (not configurable)

configname: CONFIG_GENERIC_CPU_AUTOPROBE

Linux Kernel Configuration
└─>Device Drivers
└─>Generic Driver Options
└─>GENERIC_CPU_AUTOPROBE
In linux kernel since version 3.15 (release Date: 2014-06-08)