Revert "arm: hammerhead: Use LGE rfkill driver"

This reverts commit beb46a9d729e061b0cb9012b5e347450345bede5.
Seems to cause issues with BT
msm_serial_hs: Update to latest CAF version

* attempt to fix bt issues

Change-Id: I139877ffe9bfeb96cf22ed47c568d623ac5fd0ee
bluesleep: attempt to fix bt disconnect issue

* use changes from other msm8974 versions

Change-Id: I6a7ded0482af1c611cb48ed6f266c7d38a000907