CONFIG_CRYPTO_SHA256_PPC_SPE is not available for the selected architecture x86.
Result is shown for architecture powerpc

Hash functions: SHA-224 and SHA-256 (SPE)

modulename: sha256-ppc-spe.ko

configname: CONFIG_CRYPTO_SHA256_PPC_SPE

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (powerpc)
└─>Hash functions: SHA-224 and SHA-256 (SPE)
In linux kernel since version 3.10 (release Date: 2013-06-30)
SHA-224 and SHA-256 secure hash algorithms (FIPS 180)

Architecture: powerpc using
- SPE (Signal Processing Engine) extensions
source code:
/arch/powerpc/crypto/