default or selected kernelversion does not have config value CONFIG_ASIX_PHY.
Result is shown for kernelversion 6.5.1

Asix PHYs

modulename: asix.ko

configname: CONFIG_ASIX_PHY

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>PHY Device support and infrastructure
└─>Asix PHYs
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Currently supports the Asix Electronics PHY found in the X-Surf 100
AX88796B package.

source code:
drivers/net/phy/asix.c

is depended by
CONFIG_XSURF100