msm: camera: sensor: Turn off the i2c flash while flushing

Turn off the i2c flash while flushing if the flushed request
turns off the flash.

CRs-Fixed: 2840575
Change-Id: Ia4734ed2a4957ca4f06fac3ee5eb4681ff354fe8
Signed-off-by: Anil Kumar Kanakanti <akanakan@codeaurora.org>