default or selected kernelversion does not have config value CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ.
Result is shown for kernelversion 5.3.7

Maximum transfer size (KB) per request (up to 128)

configname: CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ

Linux Kernel Configuration
└─>Device Drivers
└─>ATA/ATAPI/MFM/RLL support
└─>Maximum transfer size (KB) per request (up to 128)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)