default or selected kernelversion does not have config value CONFIG_BRCM80211.
Result is shown for kernelversion 5.4.69

Broadcom IEEE802.11n WLAN drivers

configname: CONFIG_BRCM80211

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Wireless LAN
└─>Broadcom IEEE802.11n WLAN drivers
In linux kernel since version 2.6.37 (release Date: 2011-01-04)