usb: misc: onboard_hub: use device supply names

usb: misc: onboard_hub: use device supply names

The current implementation uses generic names for the power supplies,
which conflicts with proper name definitions in the device bindings.

Add a per-device property to include real supply names and keep generic
names for existing devices to keep backward compatibility.

Acked-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Javier Carrasco <javier.carrasco@wolfvision.net>
Link: https://lore.kernel.org/r/20240325-onboard_xvf3500-v8-1-29e3f9222922@wolfvision.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>