ASoC: zylonite: set .codec_dai_name in initializer

Fix the initialization of .codec_dai_name in zylonite_dai initializer,
do not mix it with the initialization of .codec_name which is set
already a few lines above.

Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>