dt-bindings: usb: sunxi-musb: add Allwinner A523 compatible string

The Allwinner A523/T527 SoCs have a MUSB controller fully compatible to
the D1 (and ultimately the A33), with five endpoints.

Add the new name to the list of 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/20241111013033.22793-9-andre.przywara@arm.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>