avf: improve link speed handling
avf: improve link speed handling

Support VIRTCHNL_VF_CAP_ADV_LINK_SPEED.

Type: improvement
Change-Id: Ie45c9d557d0369464cbb6881ee1259ef3807d7d5
Signed-off-by: Damjan Marion <9141bba8b2efed526e55cf796d48631af330ad98@cisco.com>

chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp