Merge branch 'net-phy-add-support-for-new-aeonsemi-phys'

Merge branch 'net-phy-add-support-for-new-aeonsemi-phys'

Christian Marangi says:

====================
net: phy: Add support for new Aeonsemi PHYs

Add support for new Aeonsemi 10G C45 PHYs. These PHYs intergate an IPC
to setup some configuration and require special handling to sync with
the parity bit. The parity bit is a way the IPC use to follow correct
order of command sent.

Supported PHYs AS21011JB1, AS21011PB1, AS21010JB1, AS21010PB1,
AS21511JB1, AS21511PB1, AS21510JB1, AS21510PB1, AS21210JB1,
AS21210PB1 that all register with the PHY ID 0x7500 0x7500
before the firmware is loaded.

The big special thing about this PHY is that it does provide
a generic PHY ID in C45 register that change to the correct one
one the firmware is loaded.

In practice:
- MMD 0x7 ID 0x7500 0x9410 -> FW LOAD -> ID 0x7500 0x9422

To handle this, we operate on .match_phy_device where
we check the PHY ID, if the ID match the generic one,
we load the firmware and we return 0 (PHY driver doesn't
match). Then PHY core will try the next PHY driver in the list
and this time the PHY is correctly filled in and we register
for it.

To help in the matching and not modify part of the PHY device
struct, .match_phy_device is extended to provide also the
current phy_driver is trying to match for. This add the
extra benefits that some other PHY can simplify their
.match_phy_device OP.
====================

Link: https://patch.msgid.link/20250517201353.5137-1-ansuelsmth@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>