iio: pressure: dlhl60d: Drop unnecessary alignment forcing.

I2C doesn't use the buffers directly for DMA so there is no need
to enforce alignment.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Tomislav Denis <tomislav.denis@avl.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-86-jic23@kernel.org