enable osmo_fsm vty commands in libosmo-mgcp-client vty

Call osmo_fsm_vty_add_cmds() to make osmo_fsm VTY commands available
in libosmo-mgcp-client's VTY interface.

Change-Id: If772edc304a9f342a57fb548f26908256cc9e6e5
Related: OS#2967
diff --git a/src/libosmo-mgcp-client/mgcp_client_vty.c b/src/libosmo-mgcp-client/mgcp_client_vty.c
index 6e8bd56..10d078a 100644
--- a/src/libosmo-mgcp-client/mgcp_client_vty.c
+++ b/src/libosmo-mgcp-client/mgcp_client_vty.c
@@ -25,6 +25,7 @@
 #include <talloc.h>
 
 #include <osmocom/vty/command.h>
+#include <osmocom/vty/misc.h>
 #include <osmocom/core/utils.h>
 
 #include <osmocom/mgcp_client/mgcp_client.h>
@@ -203,4 +204,6 @@
 	install_element(node, &cfg_mgcpgw_remote_port_cmd);
 	install_element(node, &cfg_mgcpgw_endpoint_range_cmd);
 	install_element(node, &cfg_mgcpgw_rtp_bts_base_port_cmd);
+
+	osmo_fsm_vty_add_cmds();
 }