[Feature]Upload Modem source code

Change-Id: Id4294f30faced84d3e6fd6d5e61e1111bf287a37
diff --git a/mcu/interface/protocol/lte/l2tps/l2tps_api.h b/mcu/interface/protocol/lte/l2tps/l2tps_api.h
new file mode 100644
index 0000000..acbec63
--- /dev/null
+++ b/mcu/interface/protocol/lte/l2tps/l2tps_api.h
@@ -0,0 +1,4 @@
+#ifndef L2TPS_API_H
+#include "kal_public_api.h"
+void l2tps_rcv_ilm(ilm_struct* pIlm);
+#endif
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