Notes for the STYNQ_2025_07_06_02.30 version:

Issues from the previous version have been fixed.  There is now
an extra input file in the STYNQ_BASE/boot/inputs directory
containing additions/changes to the device tree.  This is needed
because the Vivado block diagram doesn't contain full information
on the ethernet connections.

If you're setting up a new board, read the comments in some of the
existing device tree input files.  They may help in creating your
own modified ethernet connection for your board.