CONFIG_MDIO_CAVIUM (not configurable)

modulename: mdio-cavium.ko

configname: CONFIG_MDIO_CAVIUM

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>MDIO bus device drivers
└─>MDIO_CAVIUM
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/net/mdio/mdio-cavium.c