default or selected kernelversion does not have config value CONFIG_BLK_DEV_IDECS.
Result is shown for kernelversion 6.9.9

PCMCIA IDE support

modulename: ide-cs.ko

configname: CONFIG_BLK_DEV_IDECS

Linux Kernel Configuration
└─>Device Drivers
└─>ATA/ATAPI/MFM/RLL support (DEPRECATED)
└─>PCMCIA IDE support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Support for Compact Flash cards, outboard IDE disks, tape drives,
and CD-ROM drives connected through a PCMCIA card.

source code:
drivers/ide/ide-cs.c