Add AOSP Pronto drivers

commit db1e4466eb2f6cdb4cf1b7854aa0ff09eb6ef9fc
Author: Nicholas Flintham <nick@flinny.org>
Date:   Sun Apr 20 12:46:56 2014 +0100

    Update Pronto driver to kk_3.5_rb1.18 including firmware

commit c0b6ec5934c43ed874eb620492272236702ec057
Author: Nicholas Flintham <nick@flinny.org>
Date:   Thu Apr 10 16:29:36 2014 +0100

    Add Pronto WLAN Driver from kk_3.5_rb1.10 branch of
    https://www.codeaurora.org/cgit/quic/la/platform/vendor/qcom-opensource/wlan/prima/
    And update a3 defconfigs