iio: magnetometer: add clarifying comment

Add a comment clarifying better when to use <device_name> vs
<device_name>-magn in compatibility strings.

Signed-off-by: Martin Kelly <martin@martingkelly.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Martin Kelly 2018-10-25 19:38:09 -07:00 • committed by Jonathan Cameron
commit 53759e259d