dt-bindings: iio: tsl2772: add binding for avago,apds9930

This patch adds avago,apds9930 to the tsl2772 bindings.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>