dt-bindings: usb: microchip,usb5744: Remove peer-hub as requirement

The peer-hub is used to model the relationship between the USB 2 and USB
3 hub. However, it is possible to only connect USB 2 without having
USB 3. Therefore, the peer-hub property should not be marked as required.
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20240130073505.8916-1-eichest@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/microchip,usb5744.yaml

@@ -71,8 +71,6 @@ allOf:
         i2c-bus: false
     else:
       $ref: /schemas/usb/usb-device.yaml
-      required:
-        - peer-hub
 
 additionalProperties: false