CONFIG_CRYPTO_DEV_OCTEONTX_CPT is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT

Support for Marvell OcteonTX CPT driver

modulename: octeontx-cpt.ko

configname: CONFIG_CRYPTO_DEV_OCTEONTX_CPT

Linux Kernel Configuration
└─>Cryptographic API
└─>Hardware crypto devices
└─>Support for Marvell OcteonTX CPT driver
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This driver allows you to utilize the Marvell Cryptographic
Accelerator Unit(CPT) found in OcteonTX series of processors.

To compile this driver as module, choose M here:
the modules will be called octeontx-cpt and octeontx-cptvf

source code: