Since we removed support for calling an init() callback from
the platform data, introduce a function which initializes
the chip by performing a hard reset, using the reset gpio
defined in the device properties.
Signed-off-by: NOreste Salerno <oreste.salerno@tomtom.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>