ucm: Moved ucm to src/ucm subdirectory

- separate code to more files
- use standard lists to represent structures
- use alsa-lib configuration parser

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

include/list.h

@@ -162,5 +162,13 @@ static __inline__ void list_splice(struct list_head *list, struct list_head *hea
 #define list_entry(ptr, type, member) \
 	((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
 
+/**
+ * list_entry - get the struct for this entry
+ * @ptr:	the &struct list_head pointer.
+ * @type:	the type of the struct this is embedded in.
+ * @offset:	offset of entry inside a struct
+ */
+#define list_entry_offset(ptr, type, offset) \
+	((type *)((char *)(ptr)-(offset)))
 
 #endif /* _LIST_H */