CONFIG_CHESTNUT is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc
default or selected kernelversion does not have config value CONFIG_CHESTNUT.
Result is shown for kernelversion 5.19-rc1

IBM 750FX Eval board or 750GX Eval board

modulename: mv64360_pic.ko

and/or

chestnut.ko

configname: CONFIG_CHESTNUT

Machine Type
└─>IBM 750FX Eval board or 750GX Eval board
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Select CHESTNUT if configuring an IBM 750FX Eval Board or a
IBM 750GX Eval board.

source code:
arch/ppc/syslib/