ivi-shell: rework remove_surface notification

The add_notification_remove_surface API accepts a simple
wl_listener instead of a ivi-shell specific notification
function. Therefore, the API is renamed to add_listener_remove_surface.

This change has several advantages:
1. Code cleanup
2. No dynamic memory allocation. Listeners are allocated
   by controller plugins
3. Remove API is not needed. Controller plugins can easily
   remove the listener link.

The remove API is removed too:
- ivi_layout_remove_notification_remove_surface

Signed-off-by: Emre Ucan <eucan@de.adit-jv.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/ivi-shell/hmi-controller.c b/ivi-shell/hmi-controller.c
index b6716f3..b27f87b 100644
--- a/ivi-shell/hmi-controller.c
+++ b/ivi-shell/hmi-controller.c
@@ -128,6 +128,7 @@
 	struct wl_listener                  destroy_listener;
 
 	struct wl_listener                  surface_created;
+	struct wl_listener                  surface_removed;
 
 	struct wl_client                   *user_interface;
 	struct ui_setting                   ui_setting;
@@ -600,10 +601,12 @@
 }
 
 static void
-set_notification_remove_surface(struct ivi_layout_surface *ivisurf,
-				void *userdata)
+set_notification_remove_surface(struct wl_listener *listener, void *data)
 {
-	struct hmi_controller *hmi_ctrl = userdata;
+	struct hmi_controller *hmi_ctrl =
+			wl_container_of(listener, hmi_ctrl,
+					surface_removed);
+	(void)data;
 
 	switch_mode(hmi_ctrl, hmi_ctrl->layout_mode);
 }
@@ -840,8 +843,9 @@
 
 	hmi_ctrl->surface_created.notify = set_notification_create_surface;
 	ivi_layout_interface->add_listener_create_surface(&hmi_ctrl->surface_created);
-	ivi_layout_interface->add_notification_remove_surface(
-		set_notification_remove_surface, hmi_ctrl);
+
+	hmi_ctrl->surface_removed.notify = set_notification_remove_surface;
+	ivi_layout_interface->add_listener_remove_surface(&hmi_ctrl->surface_removed);
 	ivi_layout_interface->add_notification_configure_surface(
 		set_notification_configure_surface, hmi_ctrl);