mem-cache: Upgrade BaseDictionaryCompressor's stats

Upgrade this compressor's stats to match current stats API.

Change-Id: I1cb69230f8deca053bc860cedafc9e6e78446df7
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33376
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
3 files changed