msm: camera: Fix LED torch support in unified flash driver.

Extend msm_torch_led for both LEDs.
Fix Kernel WARNING: "... failed for torch-light with -EEXIST,
don't try to register things with the same name
in the same directory.

Acording to commens in:
I0d4ecdb42bb03c369458f5657fa2aa0997dcdc98
"Apply the change in the unified flash driver: msm_flash.c"

Change-Id: I2cc7e3b158d5cdc592433200edf5c6ed9fca81ae
Signed-off-by: Ivan Tiyanov <ivant@codeaurora.org>