When the rotart_encoder driver is used to report relative axis
information the "steps" in the platform data could be missing
since it's not relevant.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NDaniel Mack <daniel@caiaq.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>