[media] media: radio: assign wait_for_completion_timeout to appropriately typed var

wait_for_completion_timeout() returns unsigned long not int. This assigns
the return value to an appropriately typed variable (also helps keep
static code checkers happy).

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
1 file changed