ASoC: Fix setting adau1373_dai->master for SND_SOC_DAIFMT_CBS_CFS

In the case of SND_SOC_DAIFMT_CBS_CFS, adau1373_dai->master should be false.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>