default or selected kernelversion does not have config value CONFIG_CRYPTO_AES_586.
Result is shown for kernelversion 6.8.2

AES cipher algorithms (i586)

modulename: aes-i586.ko

configname: CONFIG_CRYPTO_AES_586

Linux Kernel Configuration
└─>Cryptographic API
└─>AES cipher algorithms (i586)
In linux kernel since version 2.6.12  
AES cipher algorithms (FIPS-197). AES uses the Rijndael
algorithm.

Rijndael appears to be consistently a very good performer in
both hardware and software across a wide range of computing
environments regardless of its use in feedback or non-feedback
modes. Its key setup time is excellent, and its key agility is
good. Rijndael's very low memory requirements make it very well
suited for restricted-space environments, in which it also
demonstrates excellent performance. Rijndael's operations are
among the easiest to defend against power and timing attacks.

The AES specifies three key sizes: 128, 192 and 256 bits

See <http://csrc.nist.gov/encryption/aes/> for more information.

source code: