iio: tsl2563: Use the correct channel2 member

Use the correct channel2 member instead of channel when dealing with sysfs
reads/writes

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Acked-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
1 file changed