Revert "msm: camera: To prevent unauthorized kernel memory write"

v4l2 framework already translates userspace address
to kernelspace address.Hence there is no need for secure
copy

This reverts commit bc68a096

Change-Id: I4ff8ad98de24bf7338c896cda9c9f7b227eb27ad
Signed-off-by: Deepak Cherian <dcheri@codeaurora.org>