default or selected kernelversion does not have config value CONFIG_I2C_AMD_ASF.
Result is shown for kernelversion 6.6.75

AMD ASF I2C Controller Support

modulename: i2c-amd-asf-plat.ko

configname: CONFIG_I2C_AMD_ASF

Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>I2C Hardware Bus support
└─>AMD ASF I2C Controller Support
In linux kernel since version 6.13 (release Date: 2025-01-19)  
This option enables support for the AMD ASF (Alert Standard Format)
I2C controller. The AMD ASF controller is an SMBus controller with
built-in ASF functionality, allowing it to issue generic SMBus
packets and communicate with the DASH controller using MCTP over
ASF.

If you have an AMD system with ASF support and want to enable this
functionality, say Y or M here. If unsure, say N.

To compile this driver as a module, choose M here: the module will
be called i2c_amd_asf_plat.

source code: