staging:iio: Fix IIO_EVENT_ATTR initialization of list head

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/sysfs.h

@@ -293,10 +293,7 @@ struct iio_const_attr {
  * @_handler: handler function to be called
  **/
 #define IIO_EVENT_ATTR(_name, _show, _store, _mask, _handler)		\
-	static struct iio_event_handler_list				\
-	iio_event_##_name = {						\
-		.handler = _handler,					\
-	};								\
+	IIO_EVENT_SH(_name, _handler);					\
 	static struct							\
 	iio_event_attr							\
 	iio_event_attr_##_name						\
@@ -324,6 +321,7 @@ struct iio_const_attr {
 #define IIO_EVENT_CODE_GYRO_BASE	400
 #define IIO_EVENT_CODE_ADC_BASE		500
 #define IIO_EVENT_CODE_MISC_BASE	600
+#define IIO_EVENT_CODE_LIGHT_BASE	700
 
 #define IIO_EVENT_CODE_DEVICE_SPECIFIC	1000