media: i2c: imx219: Fix a typo referring to a wrong variable

The imx219_init_cfg() function has stopped operating on the try format
since commit 7e700847 ("media: i2c: imx219: Switch from open to
init_cfg"), but a comment in the function wasn't updated. Fix it.

While at it, improve spelling in a second comment in the function.

Fixes: 7e700847 ("media: i2c: imx219: Switch from open to init_cfg")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>