Prepare cache setup and reservation logic to be extended w.r.t other
cache-levels.
Conceptually this change is like adding a switch-statement, in several
places, in which existing code makes a single (and only) case. This is
caused by splitting larger development to ease the review. Further cases
will be added in following steps. Such approach sometimes creates code
which may seem redundant but it is meant to simplify plugging following
extensions in an easy way.
Related-To: NEO-12837
Signed-off-by: Maciej Bielski <maciej.bielski@intel.com>
