media: ipu-bridge: Move ipu-bridge.h to include/media/

Move ipu-bridge.h to include/media/, so that it can also be used by
the atomisp code.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>