oops, put xf86-video-ati 6.x back in place.

initial import of xf86-video-ati-7.7.0

initial import of xf86-video-ati-6.14.6.

NetBSD note: The libdrm requirement seems to be KMS related which we do
not have.

* 6.15.6
This version requires the latest libdrm 2.4.36 release, and fixes a few
other bugs seen since 6.14.5.
* 6.14.5
- add solid picture accel
- tiling fixes
- new pci ids
- 6xx-9xx Xv improvements
- support for upcoming xserver API changes
- bug fixes

initial import of xf86-video-ati-6.14.1. changes include:

- several Xv fixes
- lots of kms/other stuff we can't use yet
- fixes for some crashes

- various fixes for Xvideo
- significantly superior evergreen support:
- Xv, EXA, DRI2/KMS, UMS VT switching
- various other UMS fixes
- a few random bug fixes for older chipsets
- add support for ontario (AMD Fusion), including;
- Xv, EXA, UMS
- DVI vs. HDMI fixes
- various DRI2/KMS fixes
- add support for "NI" family cards, which *require* KMS. foo..
- many other random bug fixes