Merge tag 'drm-amdkfd-next-2016-02-27' of git://people.freedesktop.org/~gabbayo/linux into drm-next

Here are a few amdkfd patches for 4.6.
These patches defer radeon/amdgpu loading in case amdkfd is not yet loaded,
by returning -EPROBE_DEFER during their probing stage.

* tag 'drm-amdkfd-next-2016-02-27' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdgpu: Return -EPROBE_DEFER when amdkfd not loaded
  drm/radeon: Return -EPROBE_DEFER when amdkfd not loaded
  drm/amdkfd: Track when module's init is complete