Add documentation for the devicetree bindings of the
Ingenic JZ4770 USB transceiver.
Signed-off-by: NPaul Cercueil <paul@crapouillou.net>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200229161820.17824-1-paul@crapouillou.netSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>