ASoC: Add compress_type as a member to snd_soc_codec

We need to keep a copy of the compress_type supplied by the codec driver
so that we can override it if necessary with whatever the machine driver
has provided us with.  The reason for not modifying the codec->driver
struct directly is that ideally we'd like to keep it const.

Adjust the code in soc-cache and soc-core to make use of the compress_type
member in the snd_soc_codec struct.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 2b1fcae..1fd1d1a 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3450,6 +3450,11 @@
 		return -ENOMEM;
 	}
 
+	if (codec_drv->compress_type)
+		codec->compress_type = codec_drv->compress_type;
+	else
+		codec->compress_type = SND_SOC_FLAT_COMPRESSION;
+
 	INIT_LIST_HEAD(&codec->dapm.widgets);
 	INIT_LIST_HEAD(&codec->dapm.paths);
 	codec->write = codec_drv->write;