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

Host AP driver for Prism2/2.5/3 PC Cards

modulename: hostap_cs.ko

configname: CONFIG_HOSTAP_CS

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Host AP driver for Prism2/2.5/3 PC Cards
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Host AP driver's version for Prism2/2.5/3 PC Cards.

"Host AP support for Prism2/2.5/3 IEEE 802.11b" is required for this
driver and its help text includes more information about the Host AP
driver.

The driver can be compiled as a module and will be named
hostap_cs.

source code: