default or selected kernelversion does not have config value CONFIG_NET_MEDIATEK_MDIO.
Result is shown for kernelversion 6.9.9
CONFIG_NET_MEDIATEK_MDIO (not configurable)
configname: CONFIG_NET_MEDIATEK_MDIO
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>NET_MEDIATEK_MDIO