drm/i915/gtt: call chipset flush directly

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 9f91cbe..c35817a 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -13,6 +13,7 @@
 	unsigned int gtt_mappable_entries;
 } *intel_gtt_get(void);
 
+void intel_gtt_chipset_flush(void);
 
 /* Special gtt memory types */
 #define AGP_DCACHE_MEMORY	1
@@ -26,4 +27,3 @@
 #define AGP_USER_CACHED_MEMORY_GFDT (1 << 3)
 
 #endif
-