mem-cache: Implement a dueling Replacement Policy

Implement a template dueling replacement policy which monitors
two replacement policies to decide and select the one that
provides the least amount of misses.

Change-Id: I6a6e96a9388cce8f8c8cd7b9c1dbe9f0554ccc64
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/37897
Tested-by: kokoro <noreply+kokoro@google.com>
4 files changed