nfp: bpf: lift the single-port limitation

Limiting the eBPF offload to a single port was a workaround
required for the PoC application FW which has not been
released externally.  It's not necessary any more.

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>