default or selected kernelversion does not have config value CONFIG_BLK_DEV_IDE_AT91.
Result is shown for kernelversion 6.2.5

Atmel AT91 (SAM9, CAP9, AT572D940HF) IDE support

modulename: at91_ide.ko

configname: CONFIG_BLK_DEV_IDE_AT91

Linux Kernel Configuration
└─>Device Drivers
└─>ATA/ATAPI/MFM/RLL support (DEPRECATED)
└─>Atmel AT91 (SAM9, CAP9, AT572D940HF) IDE support
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
source code:
drivers/ide/at91_ide.c