media: ov2740: Remove shorthand variables

media: ov2740: Remove shorthand variables

Remove two variables in ov2740_init_control() that are used as a shorthand
for where the information is really located. Make the code more readable
by removing them.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>