cxgbe(4): Fix the name of the 2 x 10/25 OCP card.

Reported by: Sony Arpita Das @ Chelsio
Fixes: 5c15094916bf cxgbe(4): Update the board names of the T6 OCP cards.
Sponsored by: Chelsio Communications

(cherry picked from commit 878413d5590c9f24fb8a92ebca00899662594874)