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

Blackfin JTAG Communication

modulename: bfin_jtag_comm.ko

configname: CONFIG_BFIN_JTAG_COMM

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Blackfin JTAG Communication
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Add support for emulating a TTY device over the Blackfin JTAG.

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

source code: