UPSTREAM: dt-bindings: connector: Add SVDM VDO properties

Add bindings of VDO properties of USB PD SVDM so that they can be
used in device tree.

Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Kyle Tso <kyletso@google.com>
Link: https://lore.kernel.org/r/20210205033415.3320439-7-kyletso@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 630dce28
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I9119816ffca55072fa322536f2b9b817200e697a