stdlib: Allow cache_hierarchy to be optional

This changeset makes the cache_hierarchy optional on the board. This
will allow us to enable the TestBoard to have memory directly connected
to the traffic generator.

Change-Id: I62d310e74c43724ea38e3b71a4d91d9e06d6e855
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64015
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed