media: staging: ipu3-imgu: Add a sanity check for the parameter struct size

There have been cases where seemingly innocuous patches have broken the
uAPI by changing the memory layout of the parameter struct. Generally such
changes also introduce a change in the size of the entire struct. This
patch adds a sanity check to avoid such cases happening in the future.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Tested-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>