Fix the size of allocated memory for the clock bulk data

Fixes: 6ae9ca9c ("ASoC: meson: aiu: add i2s and spdif support")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200214131350.337968-3-jbrunet@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>