wifi update

Change-Id: Id83b467cd146f45324764dd909ae26db15283ddf
WIFI: Use kernel version 3.4 ifdef's.

Change-Id: I7f8414839e2205dff8939cab6739789633e31204
update defconfig for wifi

Change-Id: Id7ce7c14701fc3b32bcb4b85eeecc75728003fba