nfp: allow allocation and initialization of netdev-less vNICs

vNICs used for sending and receiving control messages shouldn't
really have a netdev.  Add the ability to initialize vNICs for
netdev-less operation.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 files changed