mem-cache: Added clean eviction check for prefetchers.

pkt->req->isCacheMaintenance() would not include a check
for clean eviction before notifying the prefetcher,
causing gem5 to crash.

Change-Id: I4a56c7384818c63d6e2263f26645e87cef1243cb
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>

src/mem/cache/prefetch/base.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, 2023-2024 Arm Limited
+ * Copyright (c) 2013-2014, 2022-2024 Arm Limited
  * All rights reserved.
  *
  * The license below extends only to copyright in the software and shall
@@ -238,6 +238,7 @@ Base::probeNotify(const CacheAccessProbeArg &acc, bool miss)
     // operations or for writes that we are coaslescing.
     if (pkt->cmd.isSWPrefetch()) return;
     if (pkt->req->isCacheMaintenance()) return;
+    if (pkt->isCleanEviction()) return;
     if (pkt->isWrite() && cache.coalesce()) return;
     if (!pkt->req->hasPaddr()) {
         panic("Request must have a physical address");