drm/i915: Update DRIVER_DATE to 20151204

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.h

@@ -57,7 +57,7 @@
 
 #define DRIVER_NAME		"i915"
 #define DRIVER_DESC		"Intel Graphics"
-#define DRIVER_DATE		"20151120"
+#define DRIVER_DATE		"20151204"
 
 #undef WARN_ON
 /* Many gcc seem to no see through this and fall over :( */