default or selected kernelversion does not have config value CONFIG_SND_ATMEL_ABDAC.
Result is shown for kernelversion 6.5.1

Atmel Audio Bitstream DAC (ABDAC) driver

modulename: snd-atmel-abdac.ko

configname: CONFIG_SND_ATMEL_ABDAC

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>Atmel devices (AVR32 and AT91)
└─>Atmel Audio Bitstream DAC (ABDAC) driver
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
ALSA sound driver for the Atmel Audio Bitstream DAC (ABDAC).

source code:
sound/atmel/
selects
CONFIG_SND_PCM