hnbgw: use proper VTY port number defined in libosmocore (4261)

We used to have hardcoded 2323 from early development, use the proper
libosmocore definition instead.

Depends: Ife52a968a41cb286f640006587877971ff66c1a4 (libosmocore)
Change-Id: Id67d89695ebdc6288f507338c15ad773b8adf6e4
diff --git a/src/hnbgw.c b/src/hnbgw.c
index c1b931c..45a753f 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -45,6 +45,7 @@
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 #include <osmocom/vty/command.h>
+#include <osmocom/vty/ports.h>
 
 #include <osmocom/netif/stream.h>
 
@@ -470,7 +471,7 @@
 		log_set_log_level(osmo_stderr_target,
 				  hnbgw_cmdline_config.log_level);
 
-	rc = telnet_init_dynif(NULL, g_hnb_gw, vty_get_bind_addr(), 2323);
+	rc = telnet_init_dynif(NULL, g_hnb_gw, vty_get_bind_addr(), OSMO_VTY_PORT_HNBGW);
 	if (rc < 0) {
 		perror("Error binding VTY port");
 		exit(1);