compal-laptop: Replace SENSOR_DEVICE_ATTR with DEVICE_ATTR

The extra argument to SENSOR_DEVICE_ATTR is not used. It is therefore not
necessary to use SENSOR_DEVICE_ATTR in the first place. Replace it with
DEVICE_ATTR.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>