Intel XL710 NVM updating and driver version

[Steven Hartland]

The driver in head is outputting a warning to /var/log/messages:
ixl0: The driver for the device detected an older version of the NVM 
image than expected.
Please update the NVM image.

Having spent 30mins searching for the FreeBSD utility to perform said 
update I'm hitting a dead end so looking for advice on where to find this?

While searching for this I found that the latest driver on Intel's site 
is 1.4.8 
<https://downloadcenter.intel.com/download/25160/Network-Adapter-Driver-for-PCI-E-40-Gigabit-Network-Connections-under-FreeBSD->, 
in a file named 1.4.5 
<https://downloadcenter.intel.com/downloads/eula/25160/Network-Adapter-Driver-for-PCI-E-40-Gigabit-Network-Connections-under-FreeBSD-?httpDown=https%3A%2F%2Fdownloadmirror.intel.com%2F25160%2Feng%2Fixl-1.4.5.tar.gz> 
and reporting 1.4.5 so it looks like the wrong version was uploaded on 
Intel's download site.

The driver in HEAD is only 1.4.3 so the next question is there a reason 
HEAD is behind?

     Regards
     Steve