iio: chemical: atlas: Fix buffer alignment in iio_push_to_buffers_with_timestamp()

Variable location for the timestamp, so just use __aligned(8)
to ensure it is always possible to naturally align it.

Found during an audit of all calls of uses of
iio_push_to_buffers_with_timestamp()

Fixes tag is not accurate, but it will need manual backporting beyond
that point if anyone cares.

Fixes: 0d15190f ("iio: chemical: atlas-ph-sensor: rename atlas-ph-sensor to atlas-sensor")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <matt.ranostay@konsulko.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20210501171352.512953-6-jic23@kernel.org

drivers/iio/chemical/atlas-sensor.c

@@ -91,8 +91,8 @@ struct atlas_data {
 	struct regmap *regmap;
 	struct irq_work work;
 	unsigned int interrupt_enabled;
-
-	__be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */
+	/* 96-bit data + 32-bit pad + 64-bit timestamp */
+	__be32 buffer[6] __aligned(8);
 };
 
 static const struct regmap_config atlas_regmap_config = {