In order to update the firmware of OEM adapters from Dell (or any others for that matter), you must download their firmware release that matches the PSID of the adapter. In your case, from what you shared, the PSID of the adapter in question is DEL2180110032.
The best way to find the driver is to go to the Dell support page for your server using the service tag and locate the drivers and firmware packages there. None of the OEM adapters that are not Mellanox-branded may be updated with the OFED packages from mellanox.com.
This was the latest release I could find on the Dell site: Mellanox Linux Drivers and Install Script for Mellanox ConnectX-3, ConnectX-4 Lx and ConnectX-4 Ethernet adapters, Mella…
Hope this helps!
Thank you, Joseph!