usb: dwc2: Add functions to check the HW OTG config
Added functions to query the GHWCFG2.OTG_MODE. This tells us whether the controller hardware is configured for OTG, device-only, or host-only. Signed-off-by: John Youn <johnyoun@synopsys.com> Tested-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Felipe Balbi <balbi@ti.com>
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