nfp: abm: map per-band symbols

In preparation for multi-band RED offload if FW is capable map
the extended symbols which will allow us to set per-band parameters
and read stats.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>