dt-bindings: usb: dwc3: Add QDU1000 compatible

Document the QDU1000 dwc3 compatible.

Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240502082017.13777-4-quic_kbajaj@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>