CONFIG_CRYPTO_DEV_NITROX_CNN55XX is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT

Support for Cavium CNN55XX driver

modulename: n5pf.ko


Linux Kernel Configuration
└─>Cryptographic API
└─>Hardware crypto devices
└─>Support for Cavium CNN55XX driver
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Support for Cavium NITROX family CNN55XX driver
for accelerating crypto workloads.

To compile this as a module, choose M here: the module
will be called n5pf.

source code: