ASoC: dapm: Constify lots of names that are never modified

Neater and avoids warnings when used in other places where const strings
are desired.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

include/sound/soc-dapm.h

@@ -445,8 +445,8 @@ struct snd_soc_dapm_route {
 
 /* dapm audio path between two widgets */
 struct snd_soc_dapm_path {
-	char *name;
-	char *long_name;
+	const char *name;
+	const char *long_name;
 
 	/* source (input) and sink (output) widgets */
 	struct snd_soc_dapm_widget *source;
@@ -469,8 +469,8 @@ struct snd_soc_dapm_path {
 /* dapm widget */
 struct snd_soc_dapm_widget {
 	enum snd_soc_dapm_type id;
-	char *name;		/* widget name */
-	char *sname;	/* stream name */
+	const char *name;		/* widget name */
+	const char *sname;	/* stream name */
 	struct snd_soc_codec *codec;
 	struct snd_soc_platform *platform;
 	struct list_head list;

include/sound/soc.h

@@ -366,7 +366,7 @@ void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
  *Controls
  */
 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
-				  void *data, char *long_name,
+				  void *data, const char *long_name,
 				  const char *prefix);
 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
 	const struct snd_kcontrol_new *controls, int num_controls);

sound/soc/soc-core.c

@@ -2018,7 +2018,7 @@ EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
  * Returns 0 for success, else error.
  */
 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
-				  void *data, char *long_name,
+				  void *data, const char *long_name,
 				  const char *prefix)
 {
 	struct snd_kcontrol_new template;