staging: iio: meter: new driver for ADE7753/6 devices

This also kicks off the new meter subsection.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile
index 766a5d1..5b449a1 100644
--- a/drivers/staging/iio/Makefile
+++ b/drivers/staging/iio/Makefile
@@ -17,5 +17,6 @@
 obj-y += gyro/
 obj-y += imu/
 obj-y += light/
-obj-y += trigger/
 obj-y += magnetometer/
+obj-y += meter/
+obj-y += trigger/