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

CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK (not configurable)

configname: CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK

Linux Kernel Configuration
└─>General architecture-dependent options
└─>HAVE_SOFTIRQ_ON_OWN_STACK
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Architecture provides a function to run __do_softirq() on a
separate stack.