bdk: ini: add ini free

Additionally, fix a bug where a list could not be initialized if section type is comment or caption.

bdk/utils/ini.h

@@ -43,8 +43,9 @@ typedef struct _ini_sec_t
 	u32 color;
 } ini_sec_t;
 
-int ini_parse(link_t *dst, char *ini_path, bool is_dir);
+int   ini_parse(link_t *dst, char *ini_path, bool is_dir);
 char *ini_check_payload_section(ini_sec_t *cfg);
+void  ini_free(link_t *src);
 
 #endif