iwmbt_get_fwname
extern char *iwmbt_get_fwname(struct iwmbt_version *ver,
firmware_path = iwmbt_get_fwname(&ver, NULL, firmware_dir, "bseq");
firmware_path = iwmbt_get_fwname(&ver, ¶ms, firmware_dir, "sfi");
firmware_path = iwmbt_get_fwname(&ver, ¶ms, firmware_dir, "ddc");