Move T_defs_pcu from BTS to PCU object

Change-Id: I0cac5c12dff2e90b52d00383a00b4b94a9603a0a
diff --git a/src/tbf_dl.cpp b/src/tbf_dl.cpp
index 613f7b8..280e057 100644
--- a/src/tbf_dl.cpp
+++ b/src/tbf_dl.cpp
@@ -1365,7 +1365,7 @@
 	int keep_time_frames;
 	unsigned long dl_tbf_idle_msec;
 
-	dl_tbf_idle_msec = osmo_tdef_get(bts_data()->T_defs_pcu, -2031, OSMO_TDEF_MS, -1);
+	dl_tbf_idle_msec = osmo_tdef_get(the_pcu->T_defs, -2031, OSMO_TDEF_MS, -1);
 	if (dl_tbf_idle_msec == 0)
 		return false;