Users should be able to dump the management FW logs on any
of the driver's netdevs.  Make the code only depend on the
nfp_app and share it between vNICs and representors.

Storing the dump flag is simply dropped for now, since we
only support the argument being set to 0.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>