I don't think these drivers are supported, you can try to check on the Feeds to see if there is something RTL28xx,

I found this, you can try to download or use via the feeds these 2 ipk.

http://jam2.japhar.com/feeds/OpenPLi-4/f...0.11_vusolo.ipk

http://jam2.japhar.com/feeds/OpenPLi-4/f...0.11_vusolo.ipk

Let us know,

Admin