mem-garnet: Allow empty vnet list for garnet network links

An empty supporting_vnet list is the default and implies that
all vnets are supported. This removes the assert which requires
the list to have a minimum list size of 1.

Change-Id: I6710ba06041164bbd597d98e75374a26a1aa5655
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/34258
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed