camera: Coding style (for loops, whitespaces and newlines)

Change-Id: Icc042027fa3bd37fc2815e7756a1743745be450e
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
camera: Use frame size as returned by V4L2 to correct padding

Change-Id: I6d6154d4db468b809868b14bc84d669d168b413e
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>