CONFIG_CRYPTO_SHA512_ARM64 is not available for the selected architecture x86.
Result is shown for architecture arm64

Hash functions: SHA-384 and SHA-512

modulename: sha512-arm64.ko

configname: CONFIG_CRYPTO_SHA512_ARM64

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (arm64)
└─>Hash functions: SHA-384 and SHA-512
In linux kernel since version 3.10 (release Date: 2013-06-30)
SHA-384 and SHA-512 secure hash algorithms (FIPS 180)

Architecture: arm64
source code:
/arch/arm64/crypto/