src: use namespace prefix osmo_timer* for timer functions

Summary of changes:

s/struct timer_list/struct osmo_timer_list/g
s/bsc_add_timer/osmo_timer_add/g
s/bsc_schedule_timer/osmo_timer_schedule/g
s/bsc_del_timer/osmo_timer_del/g
s/bsc_timer_pending/osmo_timer_pending/g
s/bsc_nearest_timer/osmo_timers_nearest/g
s/bsc_prepare_timers/osmo_timers_prepare/g
s/bsc_update_timers/osmo_timers_update/g
s/bsc_timer_check/osmo_timers_check/g
diff --git a/openbsc/src/utils/bs11_config.c b/openbsc/src/utils/bs11_config.c
index 9a61f4c..8e987de 100644
--- a/openbsc/src/utils/bs11_config.c
+++ b/openbsc/src/utils/bs11_config.c
@@ -50,7 +50,7 @@
 };
 static enum bs11cfg_state bs11cfg_state = STATE_NONE;
 static char *command, *value;
-struct timer_list status_timer;
+struct osmo_timer_list status_timer;
 
 static const uint8_t obj_li_attr[] = {
 	NM_ATT_BS11_BIT_ERR_THESH, 0x09, 0x00,
@@ -731,7 +731,7 @@
 		abis_nm_bs11_factory_logon(g_bts, 1);
 		break;
 	case STATE_LOGON_ACK:
-		bsc_schedule_timer(&status_timer, 5, 0);
+		osmo_timer_schedule(&status_timer, 5, 0);
 		break;
 	default:
 		break;