mem-ruby: Provide a fromSequencer helper function

Based on the CHIRequestType, it automatically tells if the
request has been originated from the sequencer
(CPU load/fetch/store)

Change-Id: I50fd116c8b1a995b1c37e948cd96db60c027fe66
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>

src/mem/ruby/protocol/chi/CHI-cache-actions.sm

@@ -3155,9 +3155,7 @@ action(Profile_OutgoingEnd_DatalessResp, desc="") {
 action(TagArrayRead, desc="") {
   assert(is_valid(tbe));
   tbe.delayNextAction := curTick() + cyclesToTicks(
-                            tagLatency((tbe.reqType == CHIRequestType:Load) ||
-                                      (tbe.reqType == CHIRequestType:Store) ||
-                                      (tbe.reqType == CHIRequestType:StoreLine)));
+    tagLatency(fromSequencer(tbe.reqType)));
 }
 
 action(TagArrayWrite, desc="") {

src/mem/ruby/protocol/chi/CHI-cache-funcs.sm

@@ -299,6 +299,12 @@ Cycles dataLatency() {
   return cache.getDataLatency();
 }
 
+bool fromSequencer(CHIRequestType reqType) {
+  return reqType == CHIRequestType:Load ||
+         reqType == CHIRequestType:Store ||
+         reqType == CHIRequestType:StoreLine;
+}
+
 bool inCache(Addr addr) {
   CacheEntry entry := getCacheEntry(makeLineAddress(addr));
   // NOTE: we consider data for the addr to be in cache if it exists in local,