dev, arm: ignore writes to the SCU

Change-Id: I31808b6d7ca2bc2af41deaec747e3a13bd4f77d2
Signed-off-by: Gedare Bloom <gedare@rtems.org>
Reviewed-on: https://gem5-review.googlesource.com/3261
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

src/dev/arm/a9scu.cc

@@ -96,7 +96,7 @@ A9SCU::write(PacketPtr pkt)
     switch (daddr) {
       default:
         // Nothing implemented at this point
-        panic("Tried to write SCU at offset %#x\n", daddr);
+        warn("Tried to write SCU at offset %#x\n", daddr);
         break;
     }
     pkt->makeAtomicResponse();