usb: dwc3: Add software-managed properties for flattened model

usb: dwc3: Add software-managed properties for flattened model

Add software-managed properties for the flattened model, which does not
need to use device tree properties to pass down information to the
common DWC3 core.

Add 'properties' in dwc3_probe_data and set default values for existing
users (dwc3-qcom, dwc3-generic-plat).

No functional changes.

Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250929-ls_dma_coherence-v5-2-2ebee578eb7e@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>