greybus: interface: add interface_id attribute

Add interface_id attribute that user space needs to identify an
interface.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
1 file changed
tree: f7fea467cdf5c8525297cade1834f4cee36ab181
  1. drivers/