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

two important bug fixes for radeon

* 'drm-next-3.20' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: fix voltage setup on hawaii
  drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if necessary