[media] smia: Fix compile failures

Fix compile of smia code.

Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=43337



Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>