Merge branch 'net-phy-micrel-add-extended-phy-support-for-ksz9477-class-devices'

Oleksij Rempel says:

====================
net: phy: micrel: add extended PHY support for KSZ9477-class devices

This patch series extends the PHY driver support for the Microchip
KSZ9477-class switch-integrated PHYs. These changes enhance ethtool
functionality and diagnostic capabilities by implementing the following
features:

- MDI/MDI-X configuration support
  All crossover modes (auto, MDI, MDI-X) are now configurable.

- RX error counter reporting
  The RXER counter (reg 0x15) is now accumulated and exported via
  ethtool stats.

- Cable test support
  Reuses the KSZ9131 implementation to enable open/short fault
  detection and approximate fault length reporting.
====================

Link: https://patch.msgid.link/20250610091354.4060454-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>