CONFIG_XRX200_PHY_FW is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_XRX200_PHY_FW.
Result is shown for kernelversion 6.9.9

XRX200 PHY firmware loader

modulename: gphy.ko

configname: CONFIG_XRX200_PHY_FW

Linux Kernel Configuration
└─>XRX200 PHY firmware loader
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/soc/lantiq/gphy.c