Merge branch 'drm-next-3.15' of git://people.freedesktop.org/~deathsimple/linux into...

this is the third pull request for 3.15 radeon changes. Highlights this time:
- More DP work from Alex, especially making use of the new DP aux helpers
- Marek's 1D and linear tiling fixes for CIK

* 'drm-next-3.15' of git://people.freedesktop.org/~deathsimple/linux:
  drm/radeon: set PIPE_CONFIG for 1D and linear tiling modes on CIK
  drm/radeon: use drm_dp_dpcd_read_link_status()
  drm/radeon: use the new drm helpers for dp aux
  drm/dp: make aux retries less chatty
  drm/radeon: clarify special handling in i2c over aux
  drm/radeon/atom: rework encoder enable/disable sequence
  drm/radeon/dp: move sink power control to a separate function
  drm/radeon/dp: use i2c_get_adapdata rather than casting