default or selected kernelversion does not have config value CONFIG_CAN_BFIN.
Result is shown for kernelversion 6.7-rc3

Analog Devices Blackfin on-chip CAN

modulename: bfin_can.ko

configname: CONFIG_CAN_BFIN

Linux Kernel Configuration
└─>Networking support
└─>CAN bus subsystem support
└─>CAN Device Drivers
└─>Analog Devices Blackfin on-chip CAN
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Driver for the Analog Devices Blackfin on-chip CAN controllers

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

source code: