sriov: PCI IDs must be checked before usage

sriov: PCI IDs must be checked before usage

Order of NIC PCI IDs handling was changed to ensure their
check and possible expansion (by missing domain part)
before their first usage. This avoids a vsperf crash
in case that sriov is configured and short NIC PCI IDs
are used.

JIRA: VSPERF-363

Change-Id: I91f724e9558bce5a92520de72b4bf000f33d2f29
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: <bmichalo@redhat.com>