msm: camera: sensor: Fix the improper pointer dereference

Pass flash_ctrl to msm_torch_create_classdev
instead of &flash_ctrl.
This change will fix the improper pointer
dereference issue. msm_torch_create_classdev needs
flash_ctrl pointer to retrieve torch informaiton.

Change-Id: I05bf130b2161336e93122d7e918a4c48a6b381e2
Signed-off-by: Rajesh Bondugula <rajeshb@codeaurora.org>