ASoC: Push snd_soc_write() and snd_soc_read() into the source file

Facilitating adding trace type stuff. For a first pass add some dev_dbg()
statements into them.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5c3bce8..aaf34d7 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -639,17 +639,9 @@
 };
 
 /* codec IO */
-static inline unsigned int snd_soc_read(struct snd_soc_codec *codec,
-					unsigned int reg)
-{
-	return codec->driver->read(codec, reg);
-}
-
-static inline unsigned int snd_soc_write(struct snd_soc_codec *codec,
-					 unsigned int reg, unsigned int val)
-{
-	return codec->driver->write(codec, reg, val);
-}
+unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg);
+unsigned int snd_soc_write(struct snd_soc_codec *codec,
+			   unsigned int reg, unsigned int val);
 
 /* device driver data */