Add one new netdev op for drivers implementing the BPF_PROG_TYPE_XDP filter. The single op is used for both setup/query of the xdp program, modelled after ndo_setup_tc. Change-Id: Ie46dec0b47e417e97d5fed19d7f2b143eab4ea73 Signed-off-by: Brenden Blanco <bblanco@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>