media: staging: improves comparisons readability in atomisp-ov5693

Fix "Comparisons should place the constant on the right side of the
test" checkpatch issue.

Signed-off-by: Riccardo Schirone <sirmy15@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>