library: s/tr_RLCMAC_DUMMY_CTRL/tr_RLCMAC_DL_DUMMY_CTRL/

There also exists UL equivalent of this message, for which I am
planning to add a template.  Let's clarify direction in the name.

Change-Id: I3b19c6679eb432b062e28aee9dd1220dbf33ee31
diff --git a/pcu/GPRS_Components.ttcn b/pcu/GPRS_Components.ttcn
index d6749d7..0f16d02 100644
--- a/pcu/GPRS_Components.ttcn
+++ b/pcu/GPRS_Components.ttcn
@@ -549,7 +549,7 @@
 	var BTS_PDTCH_Block data_msg;
 	[] BTS.receive(tr_PCUIF_DATA_PDTCH(nr.bts_nr,
 					   tr_PCUIF_DATA(nr.trx_nr, nr.ts_nr, sapi := PCU_IF_SAPI_PDTCH),
-					   tr_RLCMAC_DUMMY_CTRL())) -> value data_msg {
+					   tr_RLCMAC_DL_DUMMY_CTRL())) -> value data_msg {
 
 		BTS.send(ts_PCUIF_RTS_REQ(nr.bts_nr, nr.trx_nr, nr.ts_nr,
 					  sapi := PCU_IF_SAPI_PDTCH, fn := 0,
@@ -579,7 +579,7 @@
 	var BTS_PDTCH_Block data_msg;
 	[] BTS.receive(tr_PCUIF_DATA_PDTCH(nr.bts_nr,
 					   tr_PCUIF_DATA(nr.trx_nr, nr.ts_nr, sapi := PCU_IF_SAPI_PDTCH),
-					   tr_RLCMAC_DUMMY_CTRL())) -> value data_msg {
+					   tr_RLCMAC_DL_DUMMY_CTRL())) -> value data_msg {
 		setverdict(fail, "Unexpected Dummy Ctrl block ", data_msg);
 		f_shutdown(__BFILE__, __LINE__);
 	}
@@ -1192,7 +1192,7 @@
 	var uint32_t dl_fn;
 
 	f_rx_rlcmac_dl_block(dl_block, dl_fn, nr := nr);
-	if (not match(dl_block, tr_RLCMAC_DUMMY_CTRL())) {
+	if (not match(dl_block, tr_RLCMAC_DL_DUMMY_CTRL())) {
 		setverdict(fail, "Failed to match Packet DUMMY DL");
 		f_shutdown(__BFILE__, __LINE__);
 	}