nfp: update Agilio SmartNIC flower firmware to rev AOTC-2.12.A.13

This is a small bugfix release, most notably improving link state
stability in certain cases.
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Tested-by: Charles Murcott <charles.murcott@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>

WHENCE

@@ -4539,7 +4539,7 @@ Link: netronome/flower/nic_AMDA0078-0012_2x40.nffw -> nic_AMDA0058.nffw
 Link: netronome/flower/nic_AMDA0078-0012_4x10_1x40.nffw -> nic_AMDA0058.nffw
 Link: netronome/flower/nic_AMDA0078-0012_8x10.nffw -> nic_AMDA0058.nffw
 
-Version: AOTC-2.10.A.38
+Version: AOTC-2.12.A.13
 
 File: netronome/bpf/nic_AMDA0081-0001_1x40.nffw
 File: netronome/bpf/nic_AMDA0097-0001_2x40.nffw