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

Cavium Cryptographic Accelerator driver

modulename: cptpf.ko

configname: CONFIG_CAVIUM_CPT

Linux Kernel Configuration
└─>Cryptographic API
└─>Hardware crypto devices
└─>Cavium Cryptographic Accelerator driver
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Support for Cavium CPT block found in octeon-tx series of
processors.

To compile this as a module, choose M here.

source code:

depends
CONFIG_64BIT
CONFIG_CRYPTO
CONFIG_CRYPTO_HW
CONFIG_PCI_MSI
CONFIG_ARCH_THUNDER or CONFIG_COMPILE_TEST