mem-cache: Create Tree-PLRU replacement policy

Implementation of a Tree-PLRU replacement policy. It is based on
the assumption that a set associative cache is used.

Change-Id: I74b227e88fd6c93aab5bb2cd0e8730376db28f52
Reviewed-on: https://gem5-review.googlesource.com/c/11106
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
5 files changed