Move gsm_bts_{trx_}set_system_infos APIs to bts{_trx}.*

Change-Id: I2aa83b499d6e5d06a0fa1001fee3111f7e639c94
diff --git a/src/ipaccess/ipaccess-config.c b/src/ipaccess/ipaccess-config.c
index 34ad57f..c9264d7 100644
--- a/src/ipaccess/ipaccess-config.c
+++ b/src/ipaccess/ipaccess-config.c
@@ -1133,18 +1133,12 @@
 
 /* Stub */
 int osmo_bsc_sigtran_send(struct gsm_subscriber_connection *conn, struct msgb *msg)
-{
-	return 0;
-}
-
-/* Stub */
+{ return 0; }
 int osmo_bsc_sigtran_open_conn(struct gsm_subscriber_connection *conn, struct msgb *msg)
-{
-	return 0;
-}
-
-/* Stub */
-int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan)
-{
-	return 0;
-}
+{ return 0; }
+int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan) { return 0; }
+void pcu_info_update(struct gsm_bts *bts) {};
+int rsl_sacch_filling(struct gsm_bts_trx *trx, uint8_t type, const uint8_t *data, int len) { return 0; }
+int rsl_bcch_info(const struct gsm_bts_trx *trx, enum osmo_sysinfo_type si_type, const uint8_t *data, int len)
+{ return 0; }
+int gsm_generate_si(struct gsm_bts *bts, enum osmo_sysinfo_type si_type) { return 0; }