mem-cache: Use findBlock in FALRU's block access

An access must perform a block search, which is done by findBlock.

The tagHash is indexed by tags, so use extractTag instead of re-
implementing its functionality.

Change-Id: Ib5abacbc65cddf0f2d7e4440eb5355b56998a585
Reviewed-on: https://gem5-review.googlesource.com/10082
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
1 file changed