hwmon: Refactor SENSOR_DEVICE_ATTR_2

This patch refactors SENSOR_DEVICE_ATTR_2 macro, following pattern set by
SENSOR_ATTR.  First it creates a new macro SENSOR_ATTR_2() which expands
to an initialization expression, then it uses that in SENSOR_DEVICE_ATTR_2,
which declares and initializes a struct sensor_device_attribute_2.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

include/linux/hwmon-sysfs.h

@@ -43,11 +43,13 @@ struct sensor_device_attribute_2 {
 #define to_sensor_dev_attr_2(_dev_attr) \
 	container_of(_dev_attr, struct sensor_device_attribute_2, dev_attr)
 
-#define SENSOR_DEVICE_ATTR_2(_name,_mode,_show,_store,_nr,_index)	\
-struct sensor_device_attribute_2 sensor_dev_attr_##_name = {	\
-	.dev_attr =	__ATTR(_name,_mode,_show,_store),	\
+#define SENSOR_ATTR_2(_name, _mode, _show, _store, _nr, _index)	\
+	{ .dev_attr = __ATTR(_name, _mode, _show, _store),	\
 	  .index = _index,					\
-	.nr =		_nr,					\
-}
+	  .nr = _nr }
+
+#define SENSOR_DEVICE_ATTR_2(_name,_mode,_show,_store,_nr,_index)	\
+struct sensor_device_attribute_2 sensor_dev_attr_##_name		\
+	= SENSOR_ATTR_2(_name, _mode, _show, _store, _nr, _index)
 
 #endif /* _LINUX_HWMON_SYSFS_H */