[media] exynos4-is: Add struct exynos_video_entity

This patch introduces common structure for the video entities
to handle all video nodes and media pipelines associated with
them in more generic way.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/media/s5p_fimc.h b/include/media/s5p_fimc.h
index f509690..f5313b4 100644
--- a/include/media/s5p_fimc.h
+++ b/include/media/s5p_fimc.h
@@ -13,6 +13,7 @@
 #define S5P_FIMC_H_
 
 #include <media/media-entity.h>
+#include <media/v4l2-dev.h>
 #include <media/v4l2-mediabus.h>
 
 /*
@@ -157,6 +158,10 @@
 	struct media_pipeline *m_pipeline;
 };
 
+struct exynos_video_entity {
+	struct video_device vdev;
+};
+
 /*
  * Media pipeline operations to be called from within the fimc(-lite)
  * video node when it is the last entity of the pipeline. Implemented