datapath: Return vport configuration when queried.

datapath: Return vport configuration when queried.

Additional configuration is passed down to the kernel in the "config"
array of an odp_port when a vport is created.  This information is not
returned when a vport is queried, though.  This information is useful
for debugging, since it may be used to distinguish ports based on
additional data, such as the peer in tunnels.  In a forthcoming patch, it
will be essential to distinguish between plain GRE and GRE over IPsec.

Signed-off-by: Justin Pettit <jpettit@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>