default or selected kernelversion does not have config value CONFIG_CRYPT_CRC32C_VPMSUM.
Result is shown for kernelversion 6.4.14

CRC32c CRC algorithm (powerpc64)

modulename: crc32c-vpmsum.ko

configname: CONFIG_CRYPT_CRC32C_VPMSUM

Linux Kernel Configuration
└─>Cryptographic API
└─>CRC32c CRC algorithm (powerpc64)
In linux kernel since version 4.8 (release Date: 2016-10-02)  
CRC32c algorithm implemented using vector polynomial multiply-sum
(vpmsum) instructions, introduced in POWER8. Enable on POWER8
and newer processors for improved performance.

source code:
arch/powerpc/crypto/