pcu: Call bssgp_set_log_ss(DBSSGP) in main()

Currently the BSSGP functions in libosmocore do not log correctly to
DBSSGP since the DBSSGP variable in common_vty.c is left
uninitialized.

This commit adds the call to bssgp_set_log_ss() to inform libosmocore
which sub system id it shall use for BSSGP.

Sponsored-by: On-Waves ehf

src/pcu_main.cpp

@@ -176,6 +176,7 @@ int main(int argc, char *argv[])
 	msgb_set_talloc_ctx(tall_pcu_ctx);
 
 	osmo_init_logging(&gprs_log_info);
+	bssgp_set_log_ss(DBSSGP);
 
 	vty_init(&pcu_vty_info);
 	pcu_vty_init(&gprs_log_info);