[Intel-gfx] Updated testing branch

[Daniel Vetter]

Hi all,

Not too much this time around, mostly since I've been massively absorbed
hunt ghosts and other annoying bugs. Highlights:
- seqno wrap fixes and debug infrastructure from Mika Kuoppala and Chris
  Wilson
- some leftover kill-agp on gen6+ patches from Ben
- hotplug improvements from Damien
- clear fb when allocated from stolen, avoids dirt on the fbcon (Chris)
- some random littel bits&pieces

Go forth and test!

Cheers, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch