[git pull] drm tree for v3.6-rc1

Hi Linus, one of the smaller drm -next pulls in ages! Ben (nouveau) has a rewrite in progress but we decided to leave it stew for another cycle, so just some fixes from him. radeon: lots of documentation work, fixes, more ring and locking changes, pcie gen2, more dp fixes, i915: haswell featur

[git pull] drm tree for v3.6-rc1

Hi Linus, one of the smaller drm -next pulls in ages! Ben (nouveau) has a rewrite in progress but we decided to leave it stew for another cycle, so just some fixes from him. radeon: lots of documentation work, fixes, more ring and locking changes, pcie gen2, more dp fixes, i915: haswell featur