buildroot

rtl8189fs: new package

This package adds the rtl8189fs WiFi driver. The driver is sourced
from jwrdegoede's and icenowy's work on GitHub:
   repo: https://github.com/jwrdegoede/rtl8189ES_linux.git
   branch: rtl8189fs

Driver is known to support Realtek RTL8189FTV chip.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>