Merge remote-tracking branch 'origin/dev/msm-3.18-drm_kms' into msm-3.18

* origin/dev/msm-3.18-drm_kms:
  drm:msm: Update API define of msm_drm
  drm/msm: Rename r/w_fence in GEM to _timestamp
  drm/msm: Add Multiple Context Support API
  drm/msm: hook up dba bridge with hdmi driver
  drm/msm: Serialize gem creating in msm_gem_import
  drm/msm: fence should be protected by mutex
  drm:  Add GPU performance counter for DRM driver.

Change-Id: I3bb43a8c71134cedc65c59f933ce3f8bee2f305d
Signed-off-by: Jin Li <jinl@codeaurora.org>