ASoC: Constify struct snd_soc_codec_driver

Allow the CODEC driver structure to be marked const by making all
the APIs that use it do so.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 6c6ced7..ff2bc8b 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -1078,7 +1078,7 @@
 static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec,
 		unsigned int reg)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;
@@ -1090,7 +1090,7 @@
 static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec,
 		unsigned int reg)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;
@@ -1101,7 +1101,7 @@
 
 static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;
@@ -1301,7 +1301,7 @@
 {
 	struct snd_soc_lzo_ctx **lzo_blocks;
 	size_t reg_size, bmp_size;
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	int ret, tofree, i, blksize, blkcount;
 	const char *p, *end;
 	unsigned long *sync_bmp;
@@ -1404,7 +1404,7 @@
 {
 	int i;
 	int ret;
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	unsigned int val;
 
 	codec_drv = codec->driver;
@@ -1504,7 +1504,7 @@
 
 static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;