[media] media: Move struct media_entity_graph definition up

It will be needed in struct media_pipeline shortly.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

include/media/media-entity.h

@@ -97,6 +97,16 @@ struct media_entity_enum {
 	int idx_max;
 };
 
+struct media_entity_graph {
+	struct {
+		struct media_entity *entity;
+		struct list_head *link;
+	} stack[MEDIA_ENTITY_ENUM_MAX_DEPTH];
+
+	DECLARE_BITMAP(entities, MEDIA_ENTITY_ENUM_MAX_ID);
+	int top;
+};
+
 struct media_pipeline {
 };
 
@@ -464,16 +474,6 @@ static inline bool media_entity_enum_intersects(
 				 min(ent_enum1->idx_max, ent_enum2->idx_max));
 }
 
-struct media_entity_graph {
-	struct {
-		struct media_entity *entity;
-		struct list_head *link;
-	} stack[MEDIA_ENTITY_ENUM_MAX_DEPTH];
-
-	DECLARE_BITMAP(entities, MEDIA_ENTITY_ENUM_MAX_ID);
-	int top;
-};
-
 #define gobj_to_entity(gobj) \
 		container_of(gobj, struct media_entity, graph_obj)