ath6kl_fetch_fw_apin
ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API5_FILE);
ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API4_FILE);
ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API3_FILE);
ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API2_FILE);