msm: camera: Fix LED torch support.

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.

Change-Id: I0d4ecdb42bb03c369458f5657fa2aa0997dcdc98
Signed-off-by: Ivan Tiyanov <ivant@codeaurora.org>