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

Blackfin BF54x keypad support

modulename: bf54x-keys.ko


Linux Kernel Configuration
└─>Device Drivers
└─>Input device support
└─>Blackfin BF54x keypad support
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Say Y here if you want to use the BF54x keypad.

To compile this driver as a module, choose M here: the
module will be called bf54x-keys.

source code: