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

Console on Blackfin JTAG

configname: CONFIG_BFIN_JTAG_COMM_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Console on Blackfin JTAG
In linux kernel since version 2.6.31 (release Date: 2009-09-09)