[Feature][ZXW-265]merge P56U03 version

Only Configure: No
Affected branch: master
Affected module: unknow
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: Yes
Doc Update: No

Change-Id: I873f6df64e2605a77b8b8bfec35b21e7f33c5444
diff --git a/ap/app/include/at_msg.h b/ap/app/include/at_msg.h
index 024dcca..5c1b3a3 100755
--- a/ap/app/include/at_msg.h
+++ b/ap/app/include/at_msg.h
@@ -268,6 +268,7 @@
 	MSG_CMD_VSIMDEBUG_IND, 	//VSIMDEBUG
 	MSG_CMD_ZSCISCAN_REQ,	//VSIM cell info
 	MSG_CMD_ZSCISCAN_IND,	//VSIM cell info
+	MSG_CMD_PPP_TURN_CMD,	//PPP tty turn cmd
 };
 #endif