Allow multiple bts objects in PCU

This patch doesn't really tests whether osmo-pcu can work on a multi-bts
environment, but it prepares the data structures to be able to do so at
any later point in time.

Change-Id: I6b10913f46c19d438c4e250a436a7446694b725a
diff --git a/src/pcu_vty_functions.cpp b/src/pcu_vty_functions.cpp
index 231bce7..48780c0 100644
--- a/src/pcu_vty_functions.cpp
+++ b/src/pcu_vty_functions.cpp
@@ -246,7 +246,7 @@
 {
 	unsigned int trx_nr, ts_nr;
 
-	vty_out(vty, "BTS (%s)%s", bts->active ? "active" : "disabled", VTY_NEWLINE);
+	vty_out(vty, "BTS%" PRIu8 " (%s)%s", bts->nr, bts->active ? "active" : "disabled", VTY_NEWLINE);
 	for (trx_nr = 0; trx_nr < ARRAY_SIZE(bts->trx); trx_nr++) {
 		const struct gprs_rlcmac_trx *trx = &bts->trx[trx_nr];