ASoC: ak4642: Add pll select support

Current ak4642 was not able to select pll.
This patch add support it.
It still expect PLL base input pin is MCKI.
see Table 5 "setting of PLL Mode" of datasheet

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/sh/fsi-ak4642.c

@@ -22,11 +22,21 @@
 #include <sound/sh_fsi.h>
 #include <../sound/soc/codecs/ak4642.h>
 
+static int fsi_ak4642_dai_init(struct snd_soc_codec *codec)
+{
+	int ret;
+
+	ret = snd_soc_dai_set_sysclk(&ak4642_dai, 0, 11289600, 0);
+
+	return ret;
+}
+
 static struct snd_soc_dai_link fsi_dai_link = {
 	.name		= "AK4642",
 	.stream_name	= "AK4642",
 	.cpu_dai	= &fsi_soc_dai[0], /* fsi */
 	.codec_dai	= &ak4642_dai,
+	.init		= fsi_ak4642_dai_init,
 	.ops		= NULL,
 };