[media] smiapp: Use types better suitable for DT
[media] smiapp: Use types better suitable for DT

Signed-off-by: Sakari Ailus <8d98c2be02a446df653daa2c00496b87f3f016e4@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@osg.samsung.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs