mem-ruby: int/ext SimpleNetwork routing latency

One now may specify separate routing latencies for internal and
external links using the router's int_routing_latency and
ext_routing_latency, respectively.

JIRA: https://gem5.atlassian.net/browse/GEM5-920

Change-Id: I5532668bf23fc61d02b978bfd9479023a6ce2b16
Signed-off-by: Tiago Mück <tiago.muck@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41861
Reviewed-by: Meatboy 106 <garbage2collector@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
6 files changed