Ath6KL: load ar6004 hw1.3 fw images using firmware(9).

* Add two new files that where encoded by uuencode based on
original blobs download from Linux firmware repository:
    o firmware/AR6004/hw1.3/bdata.uu
    o firmware/AR6004/hw1.3/fw-3.uu;
* Add new kernel module ath6kl_fw that registers the fw images:
    o ath6klfw_6004_bdata_hw1.3
    o ath6klfw_6004_hw1.3_fw-3;
* Enable ath6kl_init_fetch_firmwares with all the static functions
needed to load both the board and firmware blobs;