omapdss: omap-panel-data.h: Remove struct omap_dss_device declaration

The omap_dss_device is not needed by anything in the header file.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
diff --git a/include/video/omap-panel-data.h b/include/video/omap-panel-data.h
index a64e9ba..7b4fadf8 100644
--- a/include/video/omap-panel-data.h
+++ b/include/video/omap-panel-data.h
@@ -30,8 +30,6 @@
 #include <video/omapdss.h>
 #include <video/display_timing.h>
 
-struct omap_dss_device;
-
 /**
  * connector_atv platform data
  * @name: name for this display entity