default or selected kernelversion does not have config value CONFIG_FSL_DMA_SELFTEST.
Result is shown for kernelversion 5.19-rc1

Enable the self test for each DMA channel

configname: CONFIG_FSL_DMA_SELFTEST

Linux Kernel Configuration
└─>Device Drivers
└─>DMA Engine support
└─>Enable the self test for each DMA channel
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
Enable the self test for each DMA channel. A self test will be
performed after the channel probed to ensure the DMA works well.