staging: media: atomisp: Added spaces around arithmetic operators.

Add spaces around arithmetic operators (/, +, -), to fix the checkpatch
issue.

Signed-off-by: Varsha Rao <rvarsha016@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>