TODO list for staging/r8188eu

[Fabio M. De Francesco]

Dear Larry, Philip,

>From what I understand how the development process works, drivers in staging 
should have a to-do list in the TODO file. Please read https://www.kernel.org/
doc/html/latest/process/2.Process.html?highlight=todo#staging-trees.

Could you (as the maintainers of the r8188eu driver) please compile and 
provide the above mentioned list?

Thanks,

Fabio