[media] v4l2-core: remove the old .ioctl BKL replacement

To keep V4L2 drivers that did not yet convert to unlocked_ioctl happy,
the v4l2 core had a .ioctl file operation that took a V4L2 lock.

The last drivers are now converted to unlocked_ioctl, so all this
old code can now be removed.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --cc drivers/media/v4l2-core/v4l2-dev.c
Simple merge

diff --cc drivers/media/v4l2-core/v4l2-device.c
Simple merge

diff --cc include/media/v4l2-dev.h
Simple merge

diff --cc include/media/v4l2-device.h
Simple merge