[PATCH 3.16.y-ckt 179/216] drm/i915: Invalidate media caches on gen7

3.16.7-ckt4 -stable review patch. If anyone has any objections, please let me know. -- From: Chris Wilson commit 148b83d0815a3778c8949e6a97cb798cbaa0efb3 upstream. In the gen7 pipe control there is an extra bit to flush the media caches, so let's set it during cache

[PATCH 3.16.y-ckt 179/216] drm/i915: Invalidate media caches on gen7

3.16.7-ckt4 -stable review patch. If anyone has any objections, please let me know. -- From: Chris Wilson ch...@chris-wilson.co.uk commit 148b83d0815a3778c8949e6a97cb798cbaa0efb3 upstream. In the gen7 pipe control there is an extra bit to flush the media caches, so let's set