The virtio-mem device has always had a dependency on mem-buf for plugging
in memory. Previously, the ordering was not a concern, since hotplug was
not done until userspace was up. However, in subsequent patches we
will instead hotplug in memory as soon as the virtio-mem device probes.
Change-Id: I9c4e4728a15ab32d65ffaea0ba2681a816a4abf0
Signed-off-by: Patrick Daly <quic_pdaly@quicinc.com>