control_if: Add control interface commands for FSMs

This allows programmatic access to introspection of FSM instances, which
is quite handy from e.g. external test cases: Send a message to the
code, then use the CTRL interface to check if that message has triggered
the right kind of state transition.

Change-Id: I0f80340ee9c61c88962fdd6764a6098a844d0d1e
diff --git a/include/osmocom/ctrl/control_cmd.h b/include/osmocom/ctrl/control_cmd.h
index d9092f3..3cef9d8 100644
--- a/include/osmocom/ctrl/control_cmd.h
+++ b/include/osmocom/ctrl/control_cmd.h
@@ -18,6 +18,8 @@
 	CTRL_NODE_BTS,	/* BTS specific (net.btsN.) */
 	CTRL_NODE_TRX,	/* TRX specific (net.btsN.trxM.) */
 	CTRL_NODE_TS,	/* TS specific (net.btsN.trxM.tsI.) */
+	CTRL_NODE_FSM,	/* Finite State Machine (description) */
+	CTRL_NODE_FSM_INST,	/* Finite State Machine (instance) */
 	_LAST_CTRL_NODE
 };