[media] staging: omap4iss: get entity ID using media_entity_id()

Accessing media_entity ID should now use media_entity_id() macro to
obtain the entity ID, as a next patch will remove the .id field from
struct media_entity .

So, get rid of it, otherwise the omap4iss driver will fail to build.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/staging/media/omap4iss/iss.c

@@ -607,7 +607,7 @@ static int iss_pipeline_disable(struct iss_pipeline *pipe,
 			 * crashed. Mark it as such, the ISS will be reset when
 			 * applications will release it.
 			 */
-			iss->crashed |= 1U << subdev->entity.id;
+			iss->crashed |= 1U << media_entity_id(&subdev->entity);
 			failure = -ETIMEDOUT;
 		}
 	}

drivers/staging/media/omap4iss/iss_video.c

@@ -782,7 +782,7 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 	entity = &video->video.entity;
 	media_entity_graph_walk_start(&graph, entity);
 	while ((entity = media_entity_graph_walk_next(&graph)))
-		pipe->entities |= 1 << entity->id;
+		pipe->entities |= 1 << media_entity_id(entity);
 
 	/* Verify that the currently configured format matches the output of
 	 * the connected subdev.