default or selected kernelversion does not have config value CONFIG_BCM_WIMAX.
Result is shown for kernelversion 6.5.1

Beceem BCS200/BCS220-3 and BCSM250 wimax support

modulename:  bcm_wimax.ko

configname: CONFIG_BCM_WIMAX

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Beceem BCS200/BCS220-3 and BCSM250 wimax support
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
This is an experimental driver for the Beceem WIMAX chipset used
by Sprint 4G.

source code: