media: i2c: imx334: Convert to CCI register access helpers

Use the new common CCI register access helpers to replace the private
register access helpers in the imx334 driver. This simplifies the driver
by reducing the amount of code.

Acked-by: Shravan Chippa <Shravan.Chippa@microchip.com>
Signed-off-by: Tarang Raval <tarang.raval@siliconsignals.io>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>