default or selected kernelversion does not have config value CONFIG_ISA_BUS_API.
Result is shown for kernelversion 6.9.9

CONFIG_ISA_BUS_API (not configurable)

modulename: isa.ko

configname: CONFIG_ISA_BUS_API

Linux Kernel Configuration
└─>General architecture-dependent options
└─>ISA_BUS_API
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/base//isa.c
is depended by
CONFIG_STX104