nfp: flower: fix typo in comment

Spelling mistake (triple letters) in comment.
Detected with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>