media: ipu3-cio2: Fix container_of() macro wrapper arguments

The argument of the to_sensor_asd() is called the same as the field name
for the container_of() macro, so it only works if the argument name is
"asd". Fix it.

Also switch to container_of_const().

Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>