The J7 Quad Port Add-On Ethernet Card for J721E Common-Proc-Board supports
QSGMII mode. Use the overlay to configure CPSW9G ports in QSGMII mode.

Add support to reset the PHY from kernel by using gpio-hog and gpio-reset.

Add aliases for CPSW9G ports to enable kernel to fetch MAC addresses
directly from U-Boot.
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20230315062307.1612220-3-s-vadapalli@ti.comSigned-off-by: Nishanth Menon <nm@ti.com>