default or selected kernelversion does not have config value CONFIG_CDU535.
Result is shown for kernelversion 5.15.113

Sony CDU535 CDROM support

modulename: sonycd535.ko

configname: CONFIG_CDU535

Linux Kernel Configuration
└─>Device Drivers
└─>Old CD-ROM drivers (not SCSI, not IDE)
└─>Sony CDU535 CDROM support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This is the driver for the older Sony CDU-535 and CDU-531 CD-ROM
drives. Please read the file Documentation/cdrom/sonycd535.

If you say Y here, you should also say Y or M to "ISO 9660 CD-ROM
file system support" below, because that's the file system used on
CD-ROMs.

To compile this driver as a module, choose M here: the
module will be called sonycd535.

source code: