CONFIG_CRYPTO_SHA1_ARM_NEON is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SHA1 digest algorithm (ARM NEON)

modulename: sha1-arm-neon.ko

configname: CONFIG_CRYPTO_SHA1_ARM_NEON

Linux Kernel Configuration
└─>ARM Accelerated Cryptographic Algorithms
└─>SHA1 digest algorithm (ARM NEON)
In linux kernel since version 3.10 (release Date: 2013-06-30)  
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
using optimized ARM NEON assembly, when NEON instructions are
available.

source code:
/arch/arm/crypto/