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

Scalar AES cipher for ARM

modulename: aes-arm.ko

configname: CONFIG_CRYPTO_AES_ARM

Linux Kernel Configuration
└─>ARM Accelerated Cryptographic Algorithms
└─>Scalar AES cipher for ARM
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Use optimized AES assembler routines for ARM platforms.

On ARM processors without the Crypto Extensions, this is the
fastest AES implementation for single blocks. For multiple
blocks, the NEON bit-sliced implementation is usually faster.

This implementation may be vulnerable to cache timing attacks,
since it uses lookup tables. However, as countermeasures it
disables IRQs and preloads the tables; it is hoped this makes
such attacks very difficult.

source code: