iPXE - lkrn - No more network devices with Realtek rtl8192cu

[NiKiZe]

Wifi - probably not supported in any good way.
The ones that are are most likely PCI devices, and no wifi code have been added or changed since the introduction of USB code.

If you would like to develop a driver, do it from datasheets, not linux driver.
Other suggestions,
drop wifi as a boot option, use cable.
Use a smartphone in USB theater mode, you will want to search the forum for other people already doing this, there are some gotchas.