This cast is unneeded since *of_device_id.data became const.

[ukl: split Arnd's patch by driver and add changelog]
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>