media: staging: improve comments usage in atomisp-ov5693

- Fix "Block comments use a trailing */ on a separate line" checkpatch
  issue
- Fix "Block comments use * on subsequent lines" 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>