default or selected kernelversion does not have config value CONFIG_ATH6KL_CFG80211.
Result is shown for kernelversion 5.4.69

CFG80211 support

configname: CONFIG_ATH6KL_CFG80211

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>CFG80211 support
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Enables support for CFG80211 APIs. The default option is to use WEXT. Even with this option enabled, WEXT is not explicitly disabled and the onus of not exercising WEXT lies on the application(s) running in the user space.