net: thunderx: Add VNIC's PCI devid on future chips

This patch adds PCI device IDs of VNIC on newer chips and also
registers VF driver with them. Device id remains same for all
versions of chips but subsystem device id changes.

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>