arm64: dts: qcom: sm8550: Fix compile warnings in USB controller node

arm64: dts: qcom: sm8550: Fix compile warnings in USB controller node

With W=1, the following error comes up:

Warning (avoid_unnecessary_addr_size): /soc@0/usb@a600000: unnecessary #address-cells/#size-cells without "ranges", "dma-ranges" or child "reg" or "ranges" property

This is because the child node being removed during flattening and moving
to latest bindings.

Fixes: 33450878adfc ("arm64: dts: qcom: sm8550: Flatten the USB nodes")
Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251203144856.2711440-2-krishna.kurapati@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>