[PATCH AUTOSEL for 4.15 086/189] igb: Allow to remove administratively set MAC on VFs

From: Corinna Vinschen [ Upstream commit 177132df5e45b134c147f419f567a3b56aafaf2b ] Before libvirt modifies the MAC address and vlan tag for an SRIOV VF for use by a virtual machine (either using vfio device assignment or macvtap passthru mode), it saves the current MAC

[PATCH AUTOSEL for 4.15 086/189] igb: Allow to remove administratively set MAC on VFs

From: Corinna Vinschen [ Upstream commit 177132df5e45b134c147f419f567a3b56aafaf2b ] Before libvirt modifies the MAC address and vlan tag for an SRIOV VF for use by a virtual machine (either using vfio device assignment or macvtap passthru mode), it saves the current MAC address and vlan tag so