Fix auto data call for ril v2

Change-Id: I753b1c8ac7bcbeabd316734b54b4e79224537dea
diff --git a/mbtk/mbtk_rild_v2/src/ril_ecall.c b/mbtk/mbtk_rild_v2/src/ril_ecall.c
index 60b64c5..a3ff510 100755
--- a/mbtk/mbtk_rild_v2/src/ril_ecall.c
+++ b/mbtk/mbtk_rild_v2/src/ril_ecall.c
@@ -1,3 +1,24 @@
+/*
+*    ril_ecall.c
+*
+*  Implementation of ecall related functions.
+*
+*  The general structure is as follows:
+*    API --- mbtk_rild --- atcmdsrv --- modem
+*                             |
+                              |
+*                        ecall_daemon
+*
+*/
+/******************************************************************************
+
+                          EDIT HISTORY FOR FILE
+
+  WHEN        WHO       WHAT,WHERE,WHY
+--------    --------    -------------------------------------------------------
+2024/11/04     LiuBin      Initial version
+
+******************************************************************************/
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>