V4L/DVB (13343): v4l: add more missing linux/sched.h includes

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --cc drivers/media/video/mx1_camera.c
Simple merge

diff --cc drivers/media/video/mx3_camera.c
Simple merge

diff --cc drivers/media/video/sh_mobile_ceu_camera.c
Simple merge

diff --cc drivers/media/video/videobuf-dma-contig.c
Simple merge