mem-cache: Make WeightedLRU inherit from LRU

WeightedLRU adds occupancy information to LRU, so remove the
duplicated code.

Change-Id: Ifec19ea59fb411a5ed7a891e8957b1ab93cdbf05
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47399
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
3 files changed