staging: iio: isl29028: add copyright

Add Brian Masney's copyright to the header for the several rounds of
staging cleanups that has been done to this driver.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/light/isl29028.c

@@ -3,6 +3,7 @@
  * ISL29028 is Concurrent Ambient Light and Proximity Sensor
  *
  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,