default or selected kernelversion does not have config value CONFIG_BLK_DEV_FALCON_IDE.
Result is shown for kernelversion 6.9.5

Falcon IDE interface support

modulename: falconide.ko

configname: CONFIG_BLK_DEV_FALCON_IDE

Linux Kernel Configuration
└─>Device Drivers
└─>ATA/ATAPI/MFM/RLL support (DEPRECATED)
└─>Falcon IDE interface support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This is the IDE driver for the on-board IDE interface on the Atari
Falcon. Say Y if you have a Falcon and want to use IDE devices (hard
disks, CD-ROM drives, etc.) that are connected to the on-board IDE
interface.

source code: