CONFIG_CRYPTO_CHACHA20_NEON is not available for the selected architecture x86.
Result is shown for architecture arm

CONFIG_CRYPTO_CHACHA20_NEON (not configurable)

modulename: chacha-neon.ko

configname: CONFIG_CRYPTO_CHACHA20_NEON

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (arm)
└─>CRYPTO_CHACHA20_NEON
In linux kernel since version 3.10 (release Date: 2013-06-30)
Length-preserving ciphers: ChaCha20, XChaCha20, and XChaCha12
stream cipher algorithms

Architecture: arm using:
- NEON (Advanced SIMD) extensions
source code: