drm/omap: Do not include video/omapdss.h directly in drivers

All drivers to include the omapdrm/dss/omapdss.h header file. This header
includes the <video/omapdss.h>

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4.c b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
index f892ae15..8de111ea 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi4.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
@@ -33,9 +33,9 @@
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
 #include <linux/component.h>
-#include <video/omapdss.h>
 #include <sound/omap-hdmi-audio.h>
 
+#include "omapdss.h"
 #include "hdmi4_core.h"
 #include "dss.h"
 #include "dss_features.h"