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

Threefish tweakable block cipher

modulename: threefish_block.ko

configname: CONFIG_CRYPTO_THREEFISH

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Threefish tweakable block cipher
In linux kernel since version 3.16 (release Date: 2014-08-03)  
Threefish cipher algorithm is the tweakable block cipher underneath
the Skein family of secure hash algorithms. Skein is one of 5
finalists from the NIST SHA3 competition.

Skein is optimized for modern, 64bit processors and is highly
customizable. See:

http://www.skein-hash.info/sites/default/files/skein1.3.pdf

for more information.

source code: