Merge branch 'drm-next-3.20' of git://people.freedesktop.org/~agd5f/linux into drm...

Some radeon fixes for 3.20.

* 'drm-next-3.20' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: only enable kv/kb dpm interrupts once v3
  drm/radeon: workaround for CP HW bug on CIK
  drm/radeon: Don't try to enable write-combining without PAT
  drm/radeon: use 0-255 rather than 0-100 for pwm fan range