dt-bindings: net: brcm,unimac-mdio: Add asp-v3.0

The asp-v3.0 Ethernet controller uses a brcm unimac like its
predecessor.

Signed-off-by: Justin Chen <justin.chen@broadcom.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20250422233645.1931036-7-justin.chen@broadcom.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>