mem: Add packet matching functions

Add both block and non-block-aligned packet matching functions,
so that both address and secure bits are checked when checking
whether a packet matches a request.

Change-Id: Id0069befb925d112e06f250741cb47d9dfa249cc
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17533
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>

src/mem/cache/base.cc

@@ -2451,7 +2451,7 @@ BaseCache::CacheReqPacketQueue::sendDeferredPacket()
     } else {
         // let our snoop responses go first if there are responses to
         // the same addresses
-        if (checkConflictingSnoop(entry->blkAddr)) {
+        if (checkConflictingSnoop(entry->getTarget()->pkt)) {
             return;
         }
         waitingOnRetry = entry->sendPacket(cache);