default or selected kernelversion does not have config value CONFIG_ATM_FIRESTREAM.
Result is shown for kernelversion 6.9.2

Fujitsu FireStream (FS50/FS155)

modulename: firestream.ko

configname: CONFIG_ATM_FIRESTREAM

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>ATM drivers
└─>Fujitsu FireStream (FS50/FS155)
In linux kernel since version 2.6.12  
Driver for the Fujitsu FireStream 155 (MB86697) and
FireStream 50 (MB86695) ATM PCI chips.

To compile this driver as a module, choose M here: the module will
be called firestream.

source code: