msm: isp: camera: Fix static order warnings

Remove static function from header and rearrange functions to avoid
static order warnings in compat code for 64bit builds.

Change-Id: I17ef9891291cacc59e5e6bdc4aecf76e34bc643a
Signed-off-by: Petar Sivenov <psiven@codeaurora.org>
Signed-off-by: Seemanta Dutta <seemanta@codeaurora.org>