Merge branch 'net-dsa-adjust_link-removal'

Florian Fainelli says:

====================
net: dsa: adjust_link removal

Now that the last in-tree driver (b53) has been converted to PHYLINK, we
can get rid of all of code that catered to working with drivers
implementing only PHYLIB's adjust_link callback.
====================

Link: https://lore.kernel.org/r/20240430164816.2400606-1-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>