dt-bindings: usb: dwc2: adopt otg properties defined in usb-drd.yaml

Adopt some OTG optional properties as defined in usb-drd.yaml:
- otg-rev
- hnp-disable
- srp-disable

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/1634133425-25670-3-git-send-email-fabrice.gasnier@foss.st.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>