qcom: core_ctl_helper: Remove

Remove the core control helper code since this is not needed anymore
with subsequent patches that moves core control into the kernel.

Change-Id: I62acddeb707fc7d5626580166b3466e63f45fd89
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>