Revert "Defconfig: use bcmdhd (google)"

This reverts commit bc0e51ac5c316d20ef348ab10bae535fc92b478a.
Revert "244 upstream commits for Wi-Fi driver"

This reverts commit c04b53eb9b571e6784c4114d97ce4a6ad3252ab1.
Bump kernel version to 1.6