ASoC: wm2200: don't use snd_soc_dai::symmetric_rates

wm2200 is the only user of snd_soc_dai::symmetric_rates.
Now, wm2200 is using single DAI on Component.
Thus, wm2200_priv : snd_soc_dai : snd_soc_component are 1 : 1 : 1.
We can replace snd_soc_dai::symmetric_rates on wm2200_priv.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>