nfp: update Agilio SmartNIC flower firmware to rev 5701

Some bugfixes since 5642 release:
  - Fix bug locking up the host when dumping firmware information via
    ethtool on older kernels.
  - Fix jumbo frame MTU bug
  - Fix a bug where vxlan tunnel setup could overload the host

Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>