default or selected kernelversion does not have config value CONFIG_CRC64_ROCKSOFT.
Result is shown for kernelversion 6.9.9

CRC calculation for the Rocksoft model CRC64

modulename: crc64-rocksoft.ko

configname: CONFIG_CRC64_ROCKSOFT

Linux Kernel Configuration
└─>Library routines
└─>CRC calculation for the Rocksoft model CRC64
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This option provides a CRC64 API to a registered crypto driver.
This is used with the block layer's data integrity subsystem.

source code: