msm: camera: flash: Optimizing flash off operation

Currently Flash off operation clearing torch and flash node
current first, which is adding overhead time for off operation.
Removing clearing operation make flash off operation quicker.

Change-Id: I148cfd82f7d0654792d81cd0d19d89184c4dc152
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>