phy: Add driver for EyeQ5 Ethernet PHY wrapper

EyeQ5 embeds a system-controller called OLB. It features many unrelated
registers, and some of those are registers used to configure the
integration of

phy: Add driver for EyeQ5 Ethernet PHY wrapper

EyeQ5 embeds a system-controller called OLB. It features many unrelated
registers, and some of those are registers used to configure the
integration of the RGMII/SGMII Cadence PHY used by MACB/GEM instances.

Wrap in a neat generic PHY provider, exposing two PHYs with standard
phy_init() / phy_set_mode() / phy_power_on() operations.

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://patch.msgid.link/20260309-macb-phy-v9-1-5afd87d9db43@bootlin.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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