default or selected kernelversion does not have config value CONFIG_W35UND.
Result is shown for kernelversion 6.5.1

IS89C35 WLAN USB driver

modulename: w35und.ko

configname: CONFIG_W35UND

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Wireless LAN
└─>IS89C35 WLAN USB driver
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
This is highly experimental driver for Winbond WIFI card.

Hardware is present in some Kohjinsha subnotebooks, and in some
stand-alone USB modules. Chipset name seems to be w89c35d.

Check <http://code.google.com/p/winbondport/> for new version.

source code: