default or selected kernelversion does not have config value CONFIG_CRYPTO_MORUS640_SSE2.
Result is shown for kernelversion 6.9.9

MORUS-640 AEAD algorithm (x86_64 SSE2 implementation)

modulename: morus640-sse2.ko

configname: CONFIG_CRYPTO_MORUS640_SSE2

Linux Kernel Configuration
└─>Cryptographic API
└─>MORUS-640 AEAD algorithm (x86_64 SSE2 implementation)
In linux kernel since version 3.10 (release Date: 2013-06-30)  
SSE2 implementation of the MORUS-640 dedicated AEAD algorithm.

source code:
arch/x86/crypto/