Revert "msm: camera: Add 12 bit pix_format support in vfe fetch engine"

 * breaks slo-mo recording in gcam

This reverts commit d766ad87.

Change-Id: Iacec529a57287240f0381ef0cdcf7dec7ad9e2bf
Signed-off-by: Fiqri Ardyansyah <fiqri15072019@gmail.com>
Signed-off-by: Edwiin Kusuma Jaya <kutemeikito0905@gmail.com>