Merge branch 'drm-fixes-3.10' of git://people.freedesktop.org/~agd5f/linux into drm...

Alex writes:
Just a few fixes for radeon.  The big one is a fix for hangs on older
asics due to the ordering of interrupt initialization.

* 'drm-fixes-3.10' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: don't allow audio on DCE6
  drm/radeon: Use direct mapping for fast fb access on RS780/RS880 (v2)
  radeon: Fix system hang issue when using KMS with older cards