default or selected kernelversion does not have config value CONFIG_OAKNET.
Result is shown for kernelversion 5.4.123

National DP83902AV (Oak ethernet) support

modulename: oaknet.ko

configname: CONFIG_OAKNET

Linux Kernel Configuration
└─>Networking support
└─>Ethernet (10 or 100Mbit)
└─>National DP83902AV (Oak ethernet) support
In linux kernel since version 2.6.12  
Say Y if your machine has this type of Ethernet network card.

To compile this driver as a module, choose M here: the module
will be called oaknet.

source code: