[media] media: coda: remove duplicated call of fh_to_ctx in vidioc_s_fmt_vid_out

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Acked-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>