library/PCUIF_Types.ttcn: add optional parameter for RACH SAPI

Do not hard-code PCU_IF_SAPI_RACH for RACH.ind templates. We need
to be able to specify other SAPIs (PCU_IF_SAPI_PTCCH) in the
upcoming test cases for Timing Advance control.

Change-Id: I7e2ebcbba5e47cf44f064e429c0517ef3acb15af
diff --git a/library/PCUIF_Types.ttcn b/library/PCUIF_Types.ttcn
index bcd9066..a36e261 100644
--- a/library/PCUIF_Types.ttcn
+++ b/library/PCUIF_Types.ttcn
@@ -570,14 +570,15 @@
 						 template (value) PCUIF_BurstType burst_type,
 						 template (value) uint32_t fn,
 						 template (value) uint16_t arfcn,
-						 template (value) int16_t qta := 0
+						 template (value) int16_t qta := 0,
+						 template (value) PCUIF_Sapi sapi := PCU_IF_SAPI_RACH
 ) := {
 	msg_type := PCU_IF_MSG_RACH_IND,
 	bts_nr := bts_nr,
 	spare := '0000'O,
 	u := {
 		rach_ind := {
-			sapi := PCU_IF_SAPI_RACH,
+			sapi := sapi,
 			ra := ra,
 			qta := qta,
 			fn := fn,
@@ -591,13 +592,14 @@
 					 template uint16_t ra := ?,
 					 template uint8_t is_11bit := ?,
 					 template PCUIF_BurstType burst_type := ?,
-					 template uint32_t fn := ?) := {
+					 template uint32_t fn := ?,
+					 template PCUIF_Sapi sapi := PCU_IF_SAPI_RACH) := {
 	msg_type := PCU_IF_MSG_RACH_IND,
 	bts_nr := bts_nr,
 	spare := ?,
 	u := {
 		rach_ind := {
-			sapi := PCU_IF_SAPI_RACH,
+			sapi := sapi,
 			ra := ra,
 			qta := ?,
 			fn := fn,