dt-bindings: usb: ehci: Add atmel at91sam9g45-ehci compatible

Document at91sam9g45-ehci compatible for usb-ehci.

Signed-off-by: Varshini Rajendran <varshini.rajendran@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230728102318.265360-1-varshini.rajendran@microchip.com


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