media: i2c: imx258: Remove redundant I2C writes.

media: i2c: imx258: Remove redundant I2C writes.

Registers 0x0202 and 0x0203 are written via the control handler
for V4L2_CID_EXPOSURE, so are not needed from the mode lists.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Luis Garcia <git@luigi311.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>