staging: iio: Change GAIN macros to SCALE.

Per email exchange with Jonathan Cameron, GAIN should instead be SCALE, to
be consistent with documentation.

Resending, since this goes with the 2/2 patch.
Signed-off-by: Andrew Chew <achew@nvidia.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/magnetometer/magnet.h

@@ -12,14 +12,14 @@
 #define IIO_DEV_ATTR_MAGN_Z_OFFSET(_mode, _show, _store, _addr)	\
 	IIO_DEVICE_ATTR(magn_z_offset, _mode, _show, _store, _addr)
 
-#define IIO_DEV_ATTR_MAGN_X_GAIN(_mode, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(magn_x_gain, _mode, _show, _store, _addr)
+#define IIO_DEV_ATTR_MAGN_X_SCALE(_mode, _show, _store, _addr)		\
+	IIO_DEVICE_ATTR(magn_x_scale, _mode, _show, _store, _addr)
 
-#define IIO_DEV_ATTR_MAGN_Y_GAIN(_mode, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(magn_y_gain, _mode, _show, _store, _addr)
+#define IIO_DEV_ATTR_MAGN_Y_SCALE(_mode, _show, _store, _addr)		\
+	IIO_DEVICE_ATTR(magn_y_scale, _mode, _show, _store, _addr)
 
-#define IIO_DEV_ATTR_MAGN_Z_GAIN(_mode, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(magn_z_gain, _mode, _show, _store, _addr)
+#define IIO_DEV_ATTR_MAGN_Z_SCALE(_mode, _show, _store, _addr)		\
+	IIO_DEVICE_ATTR(magn_z_scale, _mode, _show, _store, _addr)
 
 #define IIO_DEV_ATTR_MAGN_X(_show, _addr)				\
 	IIO_DEVICE_ATTR(magn_x_raw, S_IRUGO, _show, NULL, _addr)