Merge branch 'net-phy-micrel-add-support-for-lan8842'

Horatiu Vultur says:

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net: phy: micrel: Add support for lan8842

Add support for LAN8842 which supports industry-standard SGMII.
While add this the first 3 patches in the series cleans more the
driver, they should not introduce any functional changes.
====================

Link: https://patch.msgid.link/20250818075121.1298170-1-horatiu.vultur@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>