wlan:update transmit power range

commit 7e670e39210dcc2cb90010d76db5a7b4d55b2dd9
Author: Sandeep Puligilla <spuligil@qti.qualcomm.com>
Date:   Thu Dec 19 16:06:42 2013 +0530

    wlan:update transmit power range

    Currently transmit power range is configured as 13-19db
    which is limiting transmit power so updated it with actual
    range i.e 8-22db.

    Change-Id: Ib8f9b4bd1c43a85448d82279ecd8f4338a5c16bb
    CRs-Fixed: 587584

Change-Id: If94c58f3a82a9a7168312a270f219a299af2e5d3