staging: iio: tsl2583: add tsl2583 to list of supported devices in the header

The header only listed the tsl2580 and tsl2581 devices as supported by
this driver. This patch adds the tsl2583 since it is also supported by
this driver.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/light/tsl2583.c

 /*
  * Device driver for monitoring ambient light intensity (lux)
- * within the TAOS tsl258x family of devices (tsl2580, tsl2581).
+ * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583).
  *
  * Copyright (c) 2011, TAOS Corporation.
  *