Merge tag 'drm/tegra/for-3.18-rc5' of git://people.freedesktop.org/~tagr/linux into drm-fixes

drm/tegra: Fixes for v3.18-rc5

This is a single patch that fixes the VBLANK machinery after:

	7ffd7a68 drm: Always reject drm_vblank_get() after drm_vblank_off()

* tag 'drm/tegra/for-3.18-rc5' of git://people.freedesktop.org/~tagr/linux:
  drm/tegra: dc: Add missing call to drm_vblank_on()