[network] detect if SR-IOV is enabled for an interface
This also detect the number of total vfs for each interface. Fixes: bug #13204
Prochaines maintenances programmées: lundi 06/05, lundi 03/06, lundi 01/07
Pour plus d'informations: https://doc-si.inria.fr/display/SU/Gitlab
This also detect the number of total vfs for each interface. Fixes: bug #13204