msm-camera: Add Double Padding support in Gemini.

Add support to handle the padding on both sides of the input
buffers to the Gemini driver to support rotation in ZSL mode

Change-Id: I4bc0ef5a3d0f551021afbb93fd57acdcc83875b4
Signed-off-by: Ashwini Rao <ashwinik@codeaurora.org>