default or selected kernelversion does not have config value CONFIG_CRYPTO_SHA1_OCTEON.
Result is shown for kernelversion 6.9.9

SHA1 digest algorithm (OCTEON)

modulename: octeon-sha1.ko

configname: CONFIG_CRYPTO_SHA1_OCTEON

Linux Kernel Configuration
└─>Cryptographic API
└─>SHA1 digest algorithm (OCTEON)
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 OCTEON crypto instructions, when available.

source code:
arch/mips/cavium-octeon/crypto/octeon-sha1.c