iio: light: Use aligned_s64 instead of open coding alignment.

[ Upstream commit a801016d ]

Use this new type to both slightly simplify the code and avoid
confusing static analysis tools. Mostly this series is about consistency
to avoid this code pattern getting copied into more drivers.

Acked-By: Matti Vaittinen <mazziesaccount@gmail.com> #For bu27034, rpr0521
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20241215182912.481706-9-jic23@kernel.org


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Stable-dep-of: 433b99e9 ("iio: light: as73211: Ensure buffer holes are zeroed")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>