Merge branch 'quirk-for-oem-sfp-2-5g-t-copper-module'

Russell King says:

====================
Quirk for OEM SFP-2.5G-T copper module

Frank Wunderlich reports that this copper module requires a quirk in
order to function - in that the module needs to use 2500base-X.
Moreover, negotiation must be disabled.

An example of this device would be:

  https://www.optcore.net/product/sfp-2g-t-gen
====================

Link: https://lore.kernel.org/r/ZBniMlTDZJQ242DP@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>