dt-bindings: usb: add A523 compatible string for EHCI and OCHI

dt-bindings: usb: add A523 compatible string for EHCI and OCHI

The Allwinner A523/T527 feature generic EHCI and OHCI compatible USB-2.0
host controllers (in addition to an MUSB and an XHCI controller).

Add the new name to the list of supported compatible strings.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20241111013033.22793-10-andre.przywara@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>