Lots of updates and additions for VLV, all tested this time. The biggest changes are the DPIO programming bits. Lots of the clock and lane configuration stuff is off on the other side of DPIO, and these patches are enough to get dual-head configs working with eDP and HDMI, complete with hotplug and DPMS support. Sprites are added as well, as is some initial RPS support. Other than that, it's just some small bug fixes and changes to better handle the hw in different code paths. Thanks, Jesse
