msm: camera: vfe: Remove bytes to sample conversion

This change removes bytes to sample conversion from stripe
configuration update in bus. The value to be programmed to
hardware should be determined and sent from the userspace.

Change-Id: I7647cc939de9ed6e5fc3863382bce5d009ee1821
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>