greybus: camera: Convert to bundle driver

Convert the legacy camera protocol driver to a bundle driver.

Modules now can (and must) declare the camera data cport in their
manifest as the data connection isn't hardcoded anymore.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>