CONFIG_PCS_LYNX (not configurable)

modulename: pcs-lynx.ko

configname: CONFIG_PCS_LYNX

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>PCS device drivers
└─>PCS_LYNX
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This module provides helpers to phylink for managing the Lynx PCS
which is part of the Layerscape and QorIQ Ethernet SERDES.

source code:
drivers/net/pcs/pcs-lynx.c