[media] media: davinci: vpif_capture: group v4l2_ioctl_ops

this patch groups the v4l2_ioctl_ops and align them appropriately.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>