[media] v4l: Move the media/v4l2-mediabus.h header to include/linux

The header defines the v4l2_mbus_framefmt structure which will be used
by the V4L2 subdevs userspace API.

Change the type of the v4l2_mbus_framefmt::code field to __u32, as enum
sizes can differ between different ABIs on the same architectures.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 31eb174..c33f22a 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -371,6 +371,7 @@
 header-y += usbdevice_fs.h
 header-y += utime.h
 header-y += utsname.h
+header-y += v4l2-mediabus.h
 header-y += veth.h
 header-y += vhost.h
 header-y += videodev2.h