CONFIG_CRYPTO_SHA256_SPARC64 is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT or sparc

Hash functions: SHA-224 and SHA-256

modulename: sha256-sparc64.ko

configname: CONFIG_CRYPTO_SHA256_SPARC64

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (sparc64)
└─>Hash functions: SHA-224 and SHA-256
In linux kernel since version 3.1 (release Date: 2011-10-24)  
SHA-224 and SHA-256 secure hash algorithms (FIPS 180)

Architecture: sparc64 using crypto instructions, when available

source code: