ASoC: au1x: use correct format specifier

Documentation/printk-formats.txt has
unsigned long: use %lu or %lx
size_t:        use %zu or %zx

runtime->dma_bytes is of type size_t.
runtime->min_align is of type unsigned long.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>