am e79be3d6: Add server-side callback for change in MTU (2/4)

* commit 'e79be3d6ca41ed6349012c73a3374aca3714a053':
  Add server-side callback for change in MTU (2/4)
diff --git a/btif/src/btif_gatt_server.c b/btif/src/btif_gatt_server.c
index 86275a8..eee0ed1 100644
--- a/btif/src/btif_gatt_server.c
+++ b/btif/src/btif_gatt_server.c
@@ -335,6 +335,12 @@
             break;
 
         case BTA_GATTS_MTU_EVT:
+            HAL_CBACK(bt_gatt_callbacks, server->mtu_changed_cb
+                , p_data->req_data.conn_id
+                , p_data->req_data.p_data->mtu
+            );
+            break;
+
         case BTA_GATTS_OPEN_EVT:
         case BTA_GATTS_CANCEL_OPEN_EVT:
         case BTA_GATTS_CLOSE_EVT: