[dpdk-dev] speed devarg for virtio driver

[Ivan Dyukov]

[PATCH v4 1/4] net/virtio: refactor devargs parsing
[PATCH v4 2/4] net/virtio: add link speed devarg
[PATCH v4 3/4] net/virtio-user: fix devargs parsing
[PATCH v4 4/4] net/virtio-user: adding link speed devarg
---
v4 changes:
* link_speed renamed to speed devarg
* speed devarg is added to virtio-user driver

v3 changes:
* link_speed devarg is added to virtio documentation