WL18xx Service Pack 3.2

Upgrade to Service Pack 3.2.
For usage with WL18xx 2.2, 2.1 (WL18XXGYFVR, WL18XXGHYFVR) and WL18xxQ
1.1 (WL1897AAPTQ1).
Merge pull request #4 from dotanziv/TI-ECS/bt-firmware

WL18xx Service Pack 3.2