UVD on RV770/RV790

Hi everyone,

Sorry to disappoint you but I've made a mistake in classifying the different UVD hardware generations. RV770 and RV790 have the same UVD block as on RS780 and RS880 and not the same as RV710, so it's currently NOT supported.

It's may fault because of the strange chipset numbering (RV770/RV790 is earlier than RV710). I'm working on it and the difference isn't so big so it might be possible to handle those as well.

Cheers, Christian.