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/dpi.c b/drivers/gpu/drm/omapdrm/dss/dpi.c
index 97ea602..56068d4 100644
--- a/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -34,8 +34,7 @@
 #include <linux/clk.h>
 #include <linux/component.h>
 
-#include <video/omapdss.h>
-
+#include "omapdss.h"
 #include "dss.h"
 #include "dss_features.h"